Fleas symptoms and conditions

I have been on it for two months due to severe psoriatic arthritis. I'm taking the max infusions every four weeks, methotrexate injections and prednisone. I'm tired, sleepy, sweaty and somewhat nuts a lot. However, after last week infusion, I have some type of rash-little red dots that feel like pin pricks that itch somewhat. I feel like a thousand fleas are attacking me all at one time! Has anyone had this type of feeling? PLEASE reply-it is driving me nuts.

I Take loads of medications & have always tolerated all side effects but Lipitor has floored me. I have only been on it for a month but have ceased last night after waking up vomiting. I spent a day where I had so little energy I hardly moved & was almost suicidally depressed. I have no sex drive, such an itchy scalp that my colleagues were worried I had fleas !. No appetite, flu like symptoms & muscular aches that were unbearable. I still feel woozy headed but can feel some normality returning, my doctor will not be happy as I have scarily high cholesterol that needed urgent treatment, but I am afraid that I have to find an alternative as my reactions to this drug actually made my life unlivable.