Had cervical cryotherapy and have been experiencing severe pelvic pain that comes and goes in the area of my ovarian cyst with mild itching. normal?

No : But not sure if it is due to the cryotherapy or not. If the pain is more to the side it could be referred pain from your uterus, or ovarian pain - if there is a cyst or anything. It is possible that you could have a postprocedural infection (but those typically occur within 1-2 weeks of the procedure). Fever may b asign of that. If the cryotherapy caused scarring that wont let menses pass=pain.