Hi, On June 1st (2015) I Had Blood Drawn For

Hi, on June 1st (2015) i had blood drawn for "routine" thyroid blood test. I noticed I was bruised from it the next day for 2-3 days. That is now gone, but for the last 5 days i have had somewhat of a rash, with iching (like i was stung by a bee). I have tried tea tree oil, raw coconut oil, and mild soaps for relief. It has helped some, but still itchy, somewhat red, and skin feels different than that of my other arm. can you help? thanks!