so I have a huuuge knot or hematoma from shot

Paisley
My DH put in needle and there was blood, not crazy amount but enough for a few tissues. I have a huge knot size of a racquetball...I've been avoiding the heating pad Bc nurse said no heat after transfer as embryos don't like heat...any suggestions, I'm continuing shots on other side of bum for a few days hoping this passes.