Ended period early pls help

So I had protected sex March 30th. My period was a couple days late actually.

On Saturday my period started and yesterday was my worst day. I actually kind of think it was worse than it normally is possibly because I was a lot more active. Normally after the second day my period isn’t near as bad. When I woke up I had no blood in my pad which isn’t normal but when I stood up I bled a little bit. I went shopping and almost filled a regular sized tampon. I got coffee and felt a little nauseous and very hot. After dinner I went to the bathroom and had AWFUL diarrhea and lots of nausea. My face was hot but my body was kind of cold. My stomach is gurgling. I discovered I hadn’t bled either. I don’t think I’ve ever finished my period a day early and it’s kind of concerning.

My question is, I got my period and it was pretty bad the second day so I’m pretty convinced I’m not pregnant. However I’ve never ended my period so early. Has anyone else experienced this or should I be concerned?