What's Normal After Butt Injections?

The only safe injectable material for the buttocks is your own fat.  Unfortunately, the injector is most likely not a doctor or surgeon.  Butt injections are illegal.  If you continue to feel terrible, you should go to the emergency room and let them know you have had a non medical grade material injected into your body.

If the injections were a foreign body such as silicone liquid you may be having foreign body reaction or worse and infection. Silicone gel butt implants are another alternative however are subject to many complications.
The only legitimate material that I believe should be injected into the butt is your own fatty tissue that has been extracted from yourself. Any other material is potentially dangerous and will produce a foreign body reactions, granulomas or infection.

Unfortunately, you fell in the trap of charlatans who practice on the fringes of medicine.
These injections are illegal and they inject silicone (Not medical grade), that they buy from hardware store, or Hyrogell bought on the internet to mix with soil for planting. These "PUMPING PARTIES" are illegal
YOU NEED TO BE SEEN AS AN EMERGENCY, IF YOU HAVE FEVER.
YOU GOT AN INFECTION.