Cerazette pill and lower back pain

I have been on Cerazette for 4 years now. Initially, I had headaches, breast tenderness and mood swings. These symptoms subsided after 3 months. My periods became very irregular and then stopped altogether. Although my doctors deny this all the time, I feel like the pill caused excessive weight gain. Yes, I have had circumstances that affected my life but the weight gain was dramatic. In the first year alone, I gained 15 kilograms. After 4 years, I am up to 25 kg extra weight (BMI 29) and I am struggling to lose the weight with diet and exercise. Lately, I have had more bodily hair growth and am losing some hair on my head. Not many mood swings but definitely feeling angry most of the time. I am also struggling with a very low sex drive, which is starting to affect my marriage. I have an appointment with my GP, will try to switch to the combined pill to try.

I really tried to give it a chance and persevere despite a lot of breakthrough bleeding. My skin got worse. My mood/anxiety got worse. The bleeding never stopped. I would be spotting nonstop for 2 weeks, get a period (heavier bleeding), then no bleeding for ~1 week, and then back to spotting. I didn't notice any changes to my sex drive but the constant spotting was a huge deterrent. I am now switching to a combined pill.

I only lasted 8 weeks on Cerazette due to the constant bleeding and complete loss of sex drive. I had heavier period-like bleeds every 2 weeks and still continued to spot in between. I had headaches 3-4x a week, constipation, more acne than usual, and it was starting to make me depressed. I took a month off before switching to Noriday, which I'm also stopping for loss of sex drive and spotting.