Can someone help figure out what is wrong with me, or if it is just a passing cold? I'm a fifteen year old female, and don't get sick very often. If I do get a cold, fever, or flu, it rarely gets bad.

Recently, however, I've been feeling sicker than ever before. It started with a stomachache. I didn't feel like I was going to throw up, I was just pained. The next day, however my stomach pain was gone, but I had a small cold, mainly just coughing and some sneezing. The next night I still had a cold, and without thinking about my health, spent some time in cold and wet weather. The morning after I woke up to a terrible headache at the back of my head; I could barely walk. I took two pills of Ibuprofen and that cured it for most of the day, but I still had my cold, and that night, my headache came back, along with some shaking and twitching.

Does anyone know what I am experiencing?