Irregular period for the first time

Let me just start out by saying that my period has ALWAYS been regular. I’m 29 and there is absolutely no possibility of pregnancy because you kinda have to have sex for that. BUT.... I had 2 periods in the last month and JUST started my third period. Now I will say that I have been exercising my literal ass off and working out every single day and I never did before AND I also synced the 2nd period with my best friend. But I just wanna know if this is something I should be totally freaking over or nah.