not sure what’s goin on here

i hurt my left knee about 2 weeks ago and the ER doctor said it was likely a little sprain to my MCL and swelling and pain should go away in about a week but it seems to hurt more now than it has over the last week.. is this supposed to happen? is it because all the initial shock wore off? does it look normal? (i do have hives for some reason i’m also not sure why that keeps happening also)