I got Lyme's disease 5 years ago... got bitten in the Pine Barrens of NJ.
I thought I was dying for 4 months. Whole body ached, zero energy, could barely get out of bed. Fortunately the company I worked for let me work part time from home for that period and paid me my full salary. I recovered in just enough time to not have to go on disability. Even though the worst part was for only 4 months, I felt the effects for over a year after. I think some fatigue issues I have today are attributed to my time with Lyme's.
Lyme's is very serious. I never knew how serious is was until I got it. I ended up in the emergency room on one of my worst days. It's a scary thing when you are so fatigued that you can barely walk, but everything else is fine. I was expecting to be diagnosed with leukemia at the time.