Does progestogen-only / Mini pill cause lighter 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.

Overall, I was happy with this pill. I am not currently on it as I'm in between prescriptions and its been difficult contacting my doctor. However, the last week without it has made me realise how I was benefitting from it. I used to get mood swings quite often which disappeared when on this pill. The first month, my mood swings were still there like before and I found that I was more likely to cry over small things but this went away after the first 4 weeks. Before, I would also get medium pain cramps that lasted nearly the whole day for about 2 weeks on and off every month. This went down to small cramps for an hour maybe one or twice a month which was definitely a positive. I did get one or two more spots on my face which was annoying as I've struggled with my skin for a while and was finally starting to clear it up before starting the pill but this wasn't a significant impact because I was used to my stubborn skin. I also got spots on my back and chest, but these started going away again after about 6-8 weeks. The main impact I had was my period. It went from being pretty regular and heavy for 6-7 days every month to a very light period (ranging from light/medium to basically only spotting) that lasted for 3 weeks. Although without cramps and because it was so light it didn't impact me much (it was more an inconvenience). After this, I wouldn't get my period for over a month (about 5 weeks) and then it started again. I understand that this is what would put most people off getting the pill and it was what I had been dreading the most but I realised that it wasn't as bad as I thought as most days I could get away with just a panty liner rather than an actual pad or tampon (and it reassured me I wasn't pregnant).

First few weeks were lovely, no noticeable side effects. Then came the breakthrough bleeding which didn't stop for months on end and still continues to this day at a minimal level. Couldn't fault this pill otherwise but the breakthrough bleeding is a major inconvenience and almost defeats the point of being on a form of BC. Breasts became slightly more enlarged and occasional lower back pains. I just wasn't one of the lucky ones for which bleeding stops completely. Periods are much lighter though but more drawn out. My usual 4-5 days are now 7-9 and that's not counting the daily spotting. It's been good as a temporary measure but I'll be glad to be off Lovima when the time is right because predictable periods >>> unpredictable spotting.