Ways to cope at work when ppl are talking about you?

I have a therapy appt. due to me being extremely paranoid when ppl at work are talking about me. Idk what they say about me, I haven’t done anything to anyone. I do know a girl I stopped talking to and only cordial with is 2 face and believe she has recruited everyone on my team not to talk to me🤦🏽‍♀️

***edit to add**

I know they’re taking about me cause during the whispers and giggles they look at me. And they treat me different. One of the girls use to only text me but didn’t want anyone seeing her talk to me. Now the other girl doesn’t say nothing to me at all. I asked one of the girls a work related question and she put her nose up at me and was short. But she always go to the other girl desk and gossip.