Remember that heaven can be a inch from hell. The suffering burns up the resistance - not that one should look for suffering, or prolong it.
For some it is not really helpful to think of the Ego as an illusion. Just experiencing oneself as you are is enough. Calling it ego, or any other label is just mentalization.
If you are suffering, just be with that suffering. It is only made worse trying to analyze it as "illusion" or any other label.
Whatever you call it, ego, small self, separation, at some point relief may come from letting go. For those of a religious background, the prayer, "Thy will be done," may be helpful.
On "Realization" many say they are home. It is so familiar that the question arises, "How did I ever feel that I had left this place?" You may not experience being "home" now, but that is your destination. Self never left. Only the experience of self, embodied, feels separate.
Your real Self is already there. Pure awareness. At this time it may be covered with the veil of ego, separation, embodiment, however you name it. But the veil is a veil. It does part. Every curtain is opened a different way.
Self allows whatever experience you are having now. You can only trust that your real Self knows what it is doing. Just acknowledge that all there is, is what you are. There is only this, it knows, and it is love.
The way is through a pathless land. Every person will process differently. If you've done a lot of reading, just let it all rest in the background, your path is unique. Yours will have similarities to some, and not to others. If you believe in karma, it may help to know that you may be undoing something from the past of which you are not currently aware.
The first time I read Krishnamurti, I had no idea who he was, or what his background was, or what his message was. Halfway through the book, "You are the World," I was overwhelmed with a sense of forgiveness, reduced to a fetal position on the bathroom floor. The crying was so intense, I fled had fled to the bathroom so as not to scare the other residents of the home. Since that time I have tried to find what page or passage brought on the breakthrough of self forgiveness, but can't.
For about six months after that I cried watching TV, seeing movies, reading. I would cry at the beauty of everything, faces, trees, people. There were many unitive experiences. They have all passed. If I wanted to suffer now, I could tell myself I'm not there because I'm not having those experiences any more. But why would I do that to myself? I no longer place conditions on what is.
Some eggs crack in half suddenly with a great blast of light. Some fissure and crack in a thousand little lines and see the light brighten slowly.
After the break into self forgiveness, reading K., I could only continually gush and talk about the experiences I was having. My father, a Baptist missionary, knew the signs of conversion, but he knew nothing of enlightenment.
All he could say was that I had had a conversion experience. He had no way of knowing that it was deeper than that. The experience of oneness, of unity, of love for everything is not a belief, it is not a conversion to any sect, but a break. A break from any sect, any religion. No prescribed beliefs can contain Oneness.
There is no way to know for sure whether you are experiencing kundalini or just mundane aches and pains. When the experiences are intense and extremely varied, and doctors can't find anything physically causing them, then maybe one can say it is kundalini. As with anything about the process of waking up, there is no Rx, no prescription. Keep any knowledge tentative.
With the ecstasies, when most intense, I felt that I had to let it go of the experience because there was no way of functioning in the world while in that state. At the same time, I don't know how I can say that "I" let go, because in that bliss there is NO self. The most intense ecstasies only lasted a few minutes. The long unitive states, less intense, allowed me to function but gave a whole new perspective to what life really is. Seeing beauty everywhere was a big part of that.
The Buddha said that simply knowing of enlightenment is a great boon. However, knowing that there is an alternate way of experiencing the world, but not being there, can cause suffering. Psychologically it is called cognitive dissonance.
Therapy does help. This one did Gestalt therapy in groups for many years which resulted in Primals as described by Arthur Janov. That was the process experienced here. Again, not an Rx, not a prescription.
You are the One embodied as a unique one. Your process will be yours alone. But home is home for all alike.