Help? Anesthesia vs periods

About two months ago (mid April) I had a minor surgery done (I was put under anesthesia) and I was supposed to have my period a week or two after that but all I had was dark almost dry blood come out a few times (not even enough to use a pad or tampon). My periods are pretty regular and I still haven’t had a period since February. Could my surgery/the anesthesia caused a problem with my periods? There’s no way I’d be pregnant as I’m a virgin.