Sex while pregnant?

Ok ladies .... please no judgement

i'm in a hard place my now ex left me once we found out i was pregnant i'm now 13:14 weeks and my sex drive is in overdrive. he has legit cut himself off and out of my life and wants nothing to do with the baby. Am i nasty for wanting to have sex even if it's with someone else or someone from my past i should say? I don't think it's fair that my ex is out having sex with random girls everyday and while i'm horny and dying i have to simply suck it up. 😭 idk what to do anymore.