Does progestogen-only / Mini pill cause irregular periods?

I had to switch from the combined pill to the mini pill following a bought of migraines with aura. At first, it was great - I didn’t get periods, I felt good, I wasn’t worried about strokes etc. However, after around 6 months of my body getting used to it, my periods came back, extremely irregular (I.e. 3 periods in one month), my mood and mental health had significantly declined, and my skin is absolutely terrible.

Switched to this after not liking the combined pill side effects. After a few months of using it and having very irregular periods I noticed my skin and hair became very oily, needing to be washed daily. My hair also became thinner. I decided to stop this pill and look for an alternative.

I took this on and off during covid 19 then had a break then went back Oct 2023. The first time around it was amazing no unwanted side effects, very effective. I took a break because I was not sexually active. When I went back on it in Oct 2023 my experience was the complete opposite. The 1st month was fine then I had constant spotting for the nextnear 2 months I could not cope with it and eventually stopped taking it. Then my period did not show up for a month but eventually came back.