Hi,
I am not sure if this will help you at all and I am not 100% sure that I understand your problem fully but i interpreted it in a way that is similar to something i occassionally do.
if it's not the same thing, sorry and ignore me!
just sometimes i think of what people are thinking of me and you don't want to do something because you think oh what will they think about me and you begin to think of all sorts of negative things. mine also came and went. sometimes i would think about it all the times, then it would go away, other times it would just randomly pop into my head and i didn't want to continue doing it.
anyway, my counsellor said it is important not to generalise on these things, because really you don't know what they are thinking about you! so now what i do is everytime i think like that i will say in my head stop! then i remind myself that there is no way i could ever know what someone is thinking about me and that it doesn't even matter in anyway!
i don't know if that will help you at all! deffo talking about your probelsm will really help though so well done for saying about it