What kinda of talking therapy are you having? It sounds like CBT could help, it teaches you how to counter negative thoughts. Be honest with the person counselling you and say you don't feel like you're improving and are still finding it very difficult to not let these thoughts run away with you.
Looking back though, are you still having as many bad days as you were, or are there less bad days? Even some progress is still progress.
Friends bumping in to other friends used to be something I dreaded. I felt so awkward just standing there having no idea what to say. I then started challenging these thoughts, countering them with things like "Why would I have something to say? I don't know this person." "I didn't chose to be in this situation, so they can't judge me for standing here waiting". Now I still feel kinda awkward when it happens, but I've learnt to deal with it, just accept the awkwardness, because it will end. You'll get there.
Stick with the counselling and maybe talk with your GP about you not feeling like you're improving and see what else they can offer other than ADs. They always say exercise helps, though I'm far too lazy for that.
ADs don't stop the thoughts completely, and affect people differently. But yes, from my experience I feel a lot less anxious while on ADs and I've been on 3 different sorts (side effects of some were annoying, it can take time to find the right one. Don't let them put you on paroxetine first though, I was and a doctor and a mental health nurse have both told me they don't like that one as it's quite strong).
If you decide to go on ADs, they'll keep you on them for at least 6 months, probably a year, with reviews every few months. Don't let them push you on to them though. Talk it through thoroughly with your GP (or a mental health nurse practitioner if your GP surgery has one) and make your mind up what's best for you.