Woke up with stomach pain and felt like I was overheating?

It’s now 9:24 am and I woke up about half an hour ago. Not long after waking up I noticed my stomach was hurting really bad. It wasn’t a specific area, it was my whole abdomen I suppose, I felt warm and a little like I was gonna puke. I needed to go to the toilet anyway so I did (no.2) and had a small drink of water. I keep farting and idk and I think that’s helped so maybe it was just gas? I ate quite sook before bed last night too. I feel a lot better and the pains have pretty much gone. I’ve never had pains like this before. What caused this? Trapped gas? My apppendix? Thanks for your time