What to do about the dark swollen mark on my stomach after CoolSculpting? (photos)

This is the 2nd time had this done. 1st time, no side effects nothing. 6 weeks later i had my 2nd appointment. The size of the attachment of the machine was smaller then my first time. She said that it would work better for the small stomach area. After the appointment, I got one heavy and swolen purple red mark. It stings and hurts.. i dont know what to do.. the first day it was a little bit red but it is gettin worse and worse and darker, instead of better. I Had it done this friday