Hello, lovely, I am not sure I read your last thread, but I am sending you some supportive vibes.
I left a relationship which I found controlling and difficult over a decade ago and I can still remember the sickening anxiety which I felt. I think it was because I was so used to doing what he wanted and was worried about having stepped outside my box, so to speak. It did take quite a lot of getting over (and because we had a DC together, then there was a lot of what might be called legal abuse, him using the legal system to try and tie me in knots and run me financially and emotionally dry). In other words, it was initially awful but I would not go back now for all the world.
I think it takes a lot to unpick a bad relationship and rediscover yourself, so the bit you need to hold on to and let grow is the relief. It is a journey to find who you are again without the pressure of whatever your ex’s expectations were.
Anxiety can be helped by practicing breathing techniques or if it is persistent, speak to your GP. I had CBT which I did not find very useful but some people do. I found talking to someone weekly was helpful (I was able to access counselling through my work). For insomnia, which I also had, I listened to podcasts (I particularly like Tara Brach’s teachings, she has some talks on anxiety and fear and has a nice speaking style which I now can use to fall asleep whenever I am stressed!). If I don’t sleep much, I remember I can cope on not much sleep and just avoid driving. I took up a couple of sports and now I also go to the gym, I found getting in touch with my body and what it can do good for confidence. I like walking as well. These things are harder if you have small children of course, but if you can find something to do for yourself which allows you to grow creatively and develop away from your ex. If you have friends or family you can reach out to, do so. Most of all, enjoy the freedom to become who you are, not who someone else wants you to be.
I hope that is some help and I wish you well.