Bruise like Rash!!

M

I am 4 weeks currently and my legs are itching from last 5 days..8 DPO i saw a very small bruise on my right leg so I thousht may be i got hit by something. But today i was itching very badly and now i have a very big bruise like rash on my right leg and on left leg it looks like it is still forming.. I am really really worried. Has this happened to anyone else? Any response wpuld be much appreciated.