Please help me! I recently got my ears pierced with a gun and it became infected and they are so?

Guns are bad for even have a single bullet pierce your skin. I suggest letting the hole fade out. Then you could go to a REAL ear piercer.

I had a similar situation before, the whole is inflated, so you must take out the ring first boil it in water with some mouth wash. This will help disinfect the earring, now put some ice on your ear until the swelling goes away, then re insert the ring.
It is very dangerous to use a gun, since it has gone into others and was probably not cleaned in awhile. I would recommend going to a shop that uses disposable needles they hurt less to pierce. Hope this helps.