I am a very healthy, athletic 26 year old female. I had a fever starting 2 days ago that has gone down after taking aspirin over the last 24 hours, but instead of feeling better, I feel worse. Shortly after I woke up today I started feeling pressure in my stomach, as if I was hungry, but eating didn't help. The pressure has gotten worse and risen up to my chest. I feel as though I have to belch, but forcing myself to makes me feel better for about 1 second, and then the pressure comes back even stronger. Additionally, I am salivating so much that I need to keep a pail next to my bed to let the drool fall into. Swallowing also makes the pressure in my chest feel worse. Laying down aggravates it too. Any ideas what is going on? I vaguely remember having similar experiences a couple times as a teenager, but don't think they were this uncomfortable.