Tmi warning, but last night was woken up with period like cramps and also felt like I needed to use the restroom, so I…

Tmi warning, but last night was woken up with period like cramps and also felt like I needed to use the restroom, so I went to the restroom (poop) and went and laid back down during this time I was having lots of period like cramps. I laid back down for about 20 minutes and had to do it all over again this time was diarrhea, and also some vomiting after this I laid back down and had a couple more period like cramps but 20 mins apart, so we didn't go to the hospital. I plan to call my doctor when they open but any advice on what this may have been also all day yesterday my belly was hard as a rock, as it is today. TIA