I did my first delt injection yesterday and it's killing me! It's a little swollen and hurt to put any pressure on it and hurts to move it.

This was my fourth injection overall but I've been doing quads and everyone said don't do quads because it usually really hurts after, which it did. I was limping all the time and couldn't do cardio.

But now, my delt is killing me and now I can't train my upper body. This really really sucks! What can I do?

I want to train to the fullest of my ability and I can't because every time I inject, it hurts for four days.