I'm in so much pain because my braces are killing me. Is there anything I can take for the pain?

Advil (ibuprofen) Advil (ibuprofen) is the best for this type of discomfort. Take at least 2 at a time. The soreness will dissipate in about 2 days.
NSAIDS. Address this with your orthodontist. However, non-steroidal anti-inflammatory medications can often ease this type of pain.