I have/had severe endometriosis and began using BCPs therapeutically after having my left ovary and fallopian tube removed due to a large endometrioma. I used Yasmin for over two years and loved it: It calmed my PMS mood swings, did not produce acne, no weight gain, and no between-period spotting. I switched to Yaz for three months, but my periods became irregular and I had spotting issues, so I went back on Yasmin. I never stuck with a BCP before because all others produced the aforementioned side effects.
Unfortunately, with Yasmin, my blood pressure went from the 120/70 range to the 180/90 range in two years. My OB GYN was so alarmed by the increase that she actually made me lay down for half an hour so she could retest me. The second reading (after resting) was even worse than the first.
The doctor took me off Yasmin immediately and now I'm on the blood pressure medication "Prinzide" which is causing horrible side effects.
I wish I'd never taken Yasmin.