Does progestogen-only / Mini pill cause more regular periods?

The first three months were very positive, however, since then I have gained weight, become extremely emotional and my anxiety and mood changes increased. I had a heavy period every two weeks and spotting in between. I am now changing pills as advice from a doctor

I suffer with PCOS and migraines with aura so as a result was put on desogestrel. I would bleed for a week every two weeks. Every two months I'd have a heavy bleeding for 21 days. My skin got awful. I became miserable, but I'm pretty sure this was as a result of the side effects and not due to the pill itself. I was told to give it 6 months but these side effects just intensified.

Started taking Desogestrel in August to primarily help with my period and ovulation pain. First month was okay, a bit emotional at times. First period on the mini-pill wasn't too bad, very similar to my normal ones, with pain on my first couple of days. However, didn't notice much difference for the rest of it as I suddenly got Appendicitis and had surgery at the same time. Possibly because of both my surgery and the pill, I had vaginal dryness, maybe thrush and spotting a few days afterwards. I was lightly bleeding for a week with minimal pain. A week and half break then started bleeding again, first very lightly lightly and no pain. Thought it was going to end then started getting very heavy and painful without easing for a week. After nearly 3 weeks, finally ended. 5 days of no bleeding and then started again. Looking at switching to the Combined pill and have been referred to gynaecology.