I have long term Lyme disease and Idiopathic intracranial hypertension. Lyme is a highly political disease, some people say you can't have it if you've had multiple weeks of antibiotics, but I've had IV antibiotics for several months and I still have it. Lyme can have many symptoms and has many false negatives (the longer you've had it the less likely it'll show up). I don't want to sound like a crazy person, but some people I know have been diagnosed with things like MS or Fibromyalgia before being treated for Lyme (Not all or even most, but I'm bringing it up to say the often misdiagnoses of Lyme).
I also have Idiopathic intracranial hypertension (IIH) which basically means I have to much spinal fluid causing a lot of problems. I have a spinal shunt in my back that helps drain my spinal fluid to reduce my symptoms which has helped, but I have other problems that prevent me from having a normal life.