I’ve started suffering burning muscle pain and achy joint pain, I’ve been fatigued, experienced brain fog?

I’m a nineteen year old female and recently I’ve started suffering burning muscle pain and achy joint pain. It started a month ago in my right knee and is now all over. Along with that I’ve been fatigued, experienced brain fog, prickly sensations on my skin, muscle weakness, stomach pain and strange tingling/cold sensations in my chest. To provide more information I’m 5’8 and 96 pounds.
Please help me figure out what this is. I currently don’t have a primary care giver, but I’ve been to the ER a couple times. They haven’t been able to find anything. They checked my SED rate and it was within normal range. And because I’ve been bitten by ticks recently they did a Lyme disease and other tick related disease test, but it came back negative.
Thanks in advance for the help.





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