What Causes Night Sweats And Headache?

I've been having unexplained bruising, headaches, night sweats and now a honey comb looking non itching redness has showed up on my inner thigh. I am an ER nurse and normally don't worry about minor things but these minor things are starting to add up and worry me. Also I had what appeared to be a peticeal rash after tanning last month. Am I crazy for thinking Leukemia? I'm almost 30.