The injection area is the size of a softball and it is very sore. What can I do? I do not have health insurance.

Did you get this growth hormone from a doctor? If so, call them.

If not, go to urgent care and pony up the couple hundred dollars to get proper care.

It will soon go away, but if not call a docter. It won't last forever and ull be fine. Don't worry everything will work out for u :)

I would suggest you see a doctor as soon as you can and pay what is required to get their advice.

Swelling the size of a football in your butt is potentially very serious.