Does progestogen-only / Mini pill cause weight gaining?

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.

I have found desogestrel good over the last few months compared to my experiences with the combined pill however it has definitely affected my mood. I feel more negative than I would usually and less motivated to start/do things. I am hoping that this will level out as I am on it a bit longer. I have noticed that there is a difference even between the brands of desogestrel, when I switch my mood changes and it takes a couple of weeks to stablise again.

This is an easy and quick contraception method which I have found really beneficial to me personally. My periods have now essentially stopped, with very irregular periods now being the norm with my last period being over a year ago. Because of that, when I get a period it is only a few days at a time, whereas before they would sometimes last over 2 weeks. Menstrual pain such as cramps, lower back pain etc are also a lot more controlled. I still get these every month or two but they don't last for long and the pain has decreased massively although I do get breast tenderness more than I used to pre-pill. The downsides though do include acne which has had periods of improving/getting worse and weight gain. Overall though, I like the ease of this (mine is the 12 hour mini pill) compared to other options out there.