Anyone else feel fantom kicks or flutters but not be pregnant?

I think I’m losing my mind. My youngest is 16 months old and around 13/14 months old I started feeling flutters in my lower stomach. Like I felt when I was 14-16 weeks pregnant. I’ve taken tests every week for the last 2 months the and every one has been negative. I don’t feel like all the time but for a week I was feeling them regularly then they went away for a month ish. Then yesterday while laying down I get a full on kick that you could feel if you put your hand on my stomach. Took another test negative. I’ve gotten a period every month.

Could these be fantom kicks? Are they really a thing?