Is this all in my head or is something wrong with me?

I have had a fairly high fever for the past few days and have just felt very achy and sickish (sorry for bad description). a day before i got sick, i was bitten by a tick and i was recently told you could get really sick from something like that (i don't have lyme disease, i already checked). this freaked me out of course. my skin is now really blotchy and i'm terrified. i'm not sure if this is in my head or if i need to go back to the doctor (i was already there, they ran blood tests). if you could tell me of anyway to know if i'm goin looney tunes or if this is actually more serious than i thought?