Husbands partner number?

K I already I'm gonna get shit for this because I know how women are on here. For the record, I'll already admit it. I am a very jealous and insecure woman. I'm not afraid to admit it and my husband also knows this and knew before marrying me which is why I guess he lied. Well I just found out that he's slept with more then he admitted before marriage. We've been married since 2015 and now have a daughter. I'm not exactly mad at him per se but it's fucking eating me alive that he's even slept with other people. I just want to know how to get over that pit in my belly when I think about it. Any suggestions? It's so annoying and it physically hurts my heart to think about it. Is that even normal?
@wegucci Yes I do suffer from anxiety but do not take medication for it.
Once again I do know it has no relevance to our relationship and of course it's stupid to even get upset about but I'm just wanting to know how to get over it. Some of these comments have definitely helped and I'm starting to feel a bit better. The number has not gone up since we've been together or married, I just hate feeling sad over his past lovers. It honestly pisses me off that it bothers me. Just trying to find ways to cope!