Someone please help

Hi i'm a 17 yr old female. For about two months i've been having a variety of symptoms. It all started with a sudden pain on my left eye. The pain went away but turned into pressure and i had pressure all in the left sife of my face and head. I also felt really nauseaus. The next morning i woke up and i was dizzy, nauscious, still had the pressure on the left side of my face and in my head, couldnt eat, and had diareah. I was also waking up very early in the morning feeling dizzy with heart palpatations and couldnt go back to sleep. The doctors kept telling me it was a virus. This lasted for about 3 weeks and then went away. I was completly normal for about a week until one day at work i started to have a stomach ache. As the night progressed the stomach ache got worse and then the pressure in my face and my head came back. I stayed in bed for about 2 days and then went back to school. I still had the pressure in my head and the left side of my face but was able to function. I was going to school for about 2 weeks and then one day i felt like i was going to faint. The dizziness got worse and the pressure in my head was still there. I couldnt go to school or work anymore and was in bed for 2-3 weeks. I'm a little better now but i still have the pressure in my head and left side of my face. I feel woozy and my head feels cloudy. I still have diareah almost every day and i still wake up early. I've had many tests done such as an EKG and sonogram of my heart, MRI, multiple blood tests, nuerological tests, and was even checked for lyme disease. Everything was normal and negative. I've been to tons of doctors and none of them have helped me. Does anyone have any advice for me?