What do you think I had? (weird symptoms)?

I don't normally get sick, but yesterday, I don't even understand what happened to me. I started the day normal, kind of sore everywhere, but I still think that that was from ice skating the previous day. Around 1, I started having a minor headache. I assumed it was dehydration, and drank about 2 glasses over the course of the next couple of hours. I went to the store with my mom, as the headache subsided a bit. I felt pretty much great for most of the trip, but at the end, my stomach started to hurt, up high. The pain literally travelled from the high point to my lower abdomen over the course of the next 30 minutes. I was not worried, I assumed I needed to use the restroom, so when I got home, I did so, and then laid down, not feeling any better. This is when the worst of it set in. I began to feel extremely cold and was literally *shaking*. I put on long pants, and a jacket, and got under 3 layers of covers, and I still was absolutely freezing, and it was 90 degrees outside. I started feeling mildly nauseous and almost vomited, but then drank a sip of water from my sink and I was a bit better. About 10 minutes later, the pain, nausea, and headache had mostly subsided, but I was still left with jaw weakness from the nonstop teeth chattering, and looking like I was having a seizure as I continued to shake and shiver. I stayed in bed for another hour, and then eventually I had to leave my room for dinner, and I was feeling well enough to eat, though I still didn't have a full appetite, and fortunately my coldness was subsiding by that point. Another hour later, I felt nearly normal, although a very minor headache came back. I went to sleep a bit earlier than usual, just in case, but I feel perfectly fine this morning. Do you have any idea what this could have been? Do you think that, based on the shaking, I definitely had a fairly high fever? (by fairly high, I mean 102, not 105)?