How To Cure Swelling Of The Lymph Nodes & Rashes All Over The Chest?

Hi, I have felt under the weather for a few days now. I started to feel achy at first, and really worn down. I haven't had much energy. I've gotten better, but after doing something for a while, I find I need to rest. I am 18 years old. I also had a fever that got up to 102, and it has been gone for 24 hours now. Yet I still have gotten the chills a few times, and woken up sweaty. I also have swollen lymph nodes and now I have a non-itchy rash all over my chest and stomach. What could this be?