Something feeling quezy!!

Well I’m 47 and I have regular cycles but lately it’s been coming early so mind you I have a 5 day cycle. So I just ended my cycle on the 9th the day after that I start feeling movement in my stomach like something is in there moving and it’s been moving every since. So have anybody else been having this same problem if so what could it be or what was it?? Cause I know that I can’t be pregnant but it feels like it. Could someone help me out!!!