I feel so like insecure

I’ve never been like this in a relationship, it’s just because he has done things and said things. Recently I Caught him FaceTiming and texting the some women he fucked before me. The other day I seen him texting someone on a text now number and I just blowed up for 2 days. We’re good but now I feel crazy. I’m just so angry . Idk that really wasn’t my character honestly , but I hate when someone play with my feelings when I’m loyal. Someone give m advice...