How to move past it...

My husband and I weren’t living together 2 weeks.... (it’s a long story) so we were separated. When we got back together he told me he slept with his ex girlfriend while we were apart because he thought I was going to divorce him and not see him anymore. I understand that and I’m trying to be okay with the situation but it’s really bothering me. Anyone have any advice on how to move past it? I don’t want to be one of those wives who brings stuff up constantly or dwells on it... I guess I’ll feel some better if I know she’s not pregnant. I hope not.. that’s my biggest fear. Anytime I think of the situation I get so sick to my stomach and I just want to not think about it anymore. I love my husband soooooo much..... it just really bothers me that he technically cheated on me. I also am just hurt that it was only 2 weeks and he already slept with someone else... it’s my nightmare😫😭😭