is it just hormones??

Quick question!

Lately I’ve found that I have been getting upset very easily whenever my bf/someone he knows makes comments about who he slept with in the past & feeling “threatened” by other women (random or otherwise). This is so NOT like me. I mean, I’d prefer not to listen to ppl joke or talk about him sleeping with other girls cuz I think it’s inappropriate but why am I all of a sudden feeling so upset/threatened? Are my hormones just acting up right now? Or are my emotions actually tryna tell me something? I have no idea.

& I do plan on addressing the comments about him sleeping with other girls and how it bothers me with my bf

But like what is going on with my hormones/emotions? This is so strange because I’m a fairly self confident person and I’m happy in my relationship

(We are in our 20’s)