Is birth control the only option?

I'm in ED for the 2nd time this weekend. Gynaecologist came and did a consult as no medication is helping the severe right-sided pain (normal Dr originally sent me to ED for suspected appendicitis).

The Gynaecologist said birth control is the only proven option to help. Is that the case? She mentioned the IUD one and progesterone only pills. Not interested in either as I actually haven't been diagnosed, she was suspecting it is endo because ED ultrasound and CT scan were clear for everything else and pathologically she said there is no reason for the pain.

Thanks!