I do not think that I reached the muscle when I gave myself a shot of tes400 on Saturday. The pain went away today, but I still have a huge knot on my cheek. There is a very red area where I injected about the size of a 1/2 dollar. Should I go to the ER to have it drained. I used only a 20g 1 for the injection. I know that I should have used a 1 1/2. I will the next time. Is this some type of blood knot or what. It's huge and hard... Please advise what I should do. Thanks...