Feeling movements

I feel kind of scared right now cause I don’t know what the heck is going on. My husband and I have been trying for our first baby for almost a year. My cycles have been irregular asf since we began our journey. I’m on what I’m assuming is my period but for the past week I’ve been feeling tightness and movements in my lower abdomen. I had a vomiting episode and diarrhea yesterday which I assumed to be a stomach flu since my symptoms matched up with that. Could it be gas pains? Would that feel like something moving inside you?

I’ve taken sooo many pregnancy tests and they’ve come back negative but if I’m far enough along it’d come back negative anyway because of the hook effect. I’m not trying to make myself believe I’m pregnant lol it’s just a possibility since literally anything is possible. 😂 (some women don’t find out they’re pregnant until they’re in labor or feel a kick) so I guess knowing that is psyching me out a bit.

Am I freaking crazy or has anyone else experienced “movements”?