Desogestrel pill and lower back pain

I had always suffered with very minor anxiety, however once I went on this pill I was a wreck. It was like I became a whole different person, I was irritable, mean, and I was constantly upset. In the space of a month I went from a D to and E, and I gained weight like I never have before around my lower stomach. I had always been rather skinny around there, but even after 2 years of not taking it, I have never been able to return to how my body was beforehand. The first 2 and a half weeks were normal, but after that I bled consecutively for 9 weeks, with a few 16 days staggered in between where I only briefly spotted.

i have definitely noticed good and bad side effects just after a month of taking this mini pill, one of the good ones is i have lost weight without changing my diet or physical exercise, as well as an increased sex drive and enlarged breasts! (a positive for a smaller chest sized girlie like me) however i have also experienced negatives such as very drastic mood swings that change rapidly, as well as uncomfortable vaginal dryness and more bloating than usual. i am also spotting quite frequently but not heavy whatsoever, i only have to use a tampon a day to prevent the blood from ruining my nice underwear

I have been on this contraception since I was 17 and I am now 35. The contraception has done what it said it would do and provided me with a very low risk of pregnancy. During that time I had no scares or worries that i was pregnant. Whilst being on this pill I have had no bleeding for over 5 years. Prior to that the bleeding was very minimal and infrequent. I have suffered with hornmonal (neck and jaw) acne throughout the whole time I have been on this pill. I have had frequent lower back ache and stomach cramps. I have suffered with normal to severe anxiety which has fluctuated throughout the years.