I am neither a physician nor virologist
Ya don't say. Your'e reddit echo chamber educated and don't know enough about anything on this topic to have a qualified opinion. Arrogance and ignorance always go hand in hand, mate. Motivated reasoning always loses, you'll learn that in college if you decide to further your education.
So I do take stories of someone knowing multiple people with side effects with some suspicion. It's not statistically impossible but it is improbable.
You need to step out of your echo chambers. I know cognitive dissonance hurts, but you'll be ok.
https://news.ohsu.edu/2022/09/27/global-study-finds-covid-19-vaccination-can-affect-menstrual-cycle
https://www.npr.org/2022/10/02/1126453661/how-the-covid-19-vaccine-affects-your-menstrual-cycle
https://news.tulane.edu/pr/large-study-finds-menstrual-changes-after-covid-vaccine