For The Last Few Months, On And Off, I Have

For the last few months, on and off, I have been having various issues. I have had chronic headache for 4 years, but the last few months, I have had headaches, along with nausea, and sensitivity on my skin. I also have been to the point of exhaustion that I can't stay awake any longer. I had a teratoma tumor removal about 5 years ago and haven't been completely healthy since. They have run many tests and everything comes back normal. I'm starting to really worry about my health