Itching???

So I don’t know if this is a little bit TMI to put on the app but this is been giving me severe anxiety and I really want to understand what’s going on. About a month or two ago I got together with a guy and I started to regret it because he wouldn’t talk to me afterwards anymore especially when I really needed to talk to him so I blocked him on all social media and I ended up moving to another state but I started to itch really bad on my side breast and I noticed that it got a bit smaller but that wasn’t my concern my real concern is i’m starting to itch in the lower region if you know what I mean? I’m not really quite sure why, I asked him once if he’s ever been tested and he told me that he gets physicals every year??? and I don’t know how to respond to that and I’m really scared. thankfully he did use condom but as embarrassing as it sounds he did use tongue and I don’t know if that has also any concern??