I've had lymes disease 5 times in my life, starting when I was 7.
catch it early and get your ass on some meds and you should be ok. But if left untreated you are in for a shitstorm of lifetime issues. if you have it really bad your doctor will make you come into the office everyday for an IV drip (that was tons of fun let me tell you!)
Permethrin is the ONLY THING that keeps ticks away. DEET does NOTHING for ticks.