Northisterone & endometriosis

Hi ladies, currently on day 5 of taking Norethisterone. I will be undergoing ICSI at some point after investigations, I suffer with endometriosis aswell, I have a confirmed diagnosis.

I was treated with endo 2 years ago, and I am lucky enough to have no pain from it since hardly, since taking this medication, I feel awful. My pains are back really sharply, and feels exactly what it felt like before I had my laparoscopy. I feel extremely tender aswell. Is this suppose to happen? Anyone else feel like this? 🙁

Abs x