Help me please

My ex recently blocked me on all social media platforms, even imessage because I called him on Thursday and told him I had Chlamydia. I have never had an std before but he has. He has had Chlamydia in the past and has admitted that he thinks he was treated but he did not know if it worked. When I told him he got so angry and accused ME of cheating, which he has constantly done in the past but I have never given him a reason to think this either. When I said he had given it to me he said "how could I have given it to you if I don't have any symptoms" so that shows how he thinks. He said he would slap the shit out of me and hung up and then proceeded to block me on everything. He then told his friend (we ironically share the same friend group also so yea..fun.) that I "fucked someone else". When she sent it to the gc with my friends none of them believed him and they also said that is not within my character and that he has always been known to play victim. I am stuck on why he blocked me and accused me when he either cheated (I got std tested before we got together and I was clean and free of stds), he did not truly get treated and lied, or he was treated but it did not work and he didnt bother to go for a check up which is required. What should I do about the situation? May I add, even his mother does not believe him and sympathizes with me and wants us to get back together.