Weird period

My period was only two days in October and then only two days this month! (It was also 3-4 days late this month) It’s never been like that, so it’s really strange. Nausea here and there, I’ve been exhausted these last few days. Negative pregnancy test. Not sure what’s going on. 🧐🤔 it’s so annoying not knowing lol. has anyone else had any issues like that with their body??