Desogestrel pill and lighter periods

I got put on this pill when i had a miscarriage, i get worried from time to time about my period. I have the flo app and i’m on my period about every 2 weeks, but it’s not exactly a period it’s just very very light and lasts for longer then a period should last this only started happening when i missed a pill for a day and the next day took 2 of them so it didn’t screw the pill up in my body and it has so it worries me. I’ve also put on so much weight using the pill.

I was prescribed generic Desogestrel mini pill to treat my adenomyosis. I was only on it for a couple of weeks, but I couldn't cope with the symptoms. Daily bleeding and bloating but more worryingly, horrendous nausea, dizziness and migraines. Also had swollen tender enlarged breasts.

I started taking the minipill about 6 months ago because of my really heavy and painful periods. And the first three months I still had my period, but it did get a lot lighter and less painful. The last 3 months I've had no period except for a week of spotting. My mood has become more stable, I used to become almost depressed before my period. I do however become nauseaus a lot faster especially if I'm stressed, I have lost 5 kg almost because of that. I don't think this is the best contraceptive, but I do like that it only contains one type of hormone and that I don't have my period anymore. But I'm not planning on taking it for a very long time.