Hi sun2shine. Welcome! I'm sorry you're struggling with all this. It is tricky to figure out what might be going on because it sounds like a few different things are at play here. I really like Cyran0's idea of seeing a therapist.

The medication question is definitely something to consider again too. I came off my anti-depressant for a while because I thought I could cope without it. After a few months my anxiety started going through the roof again. I'm not saying that's what is happening with you, but it might be something to think about.

I was also wondering whether you've ever had these feelings of uncertainty in previous relationships?

I would really explore the therapy option if at all possible since that could help you get to the bottom of what might be behind the anxiety. As OrangeMoira says, the anxiety about the relationship could have it's roots in another issue.

Wishing you all the very best (((((((sun2shine))))) Let us know how you're doing!