Haven’t been on the pill in 12 years- side effects?

Je

So I started my period on Wednesday, and started the pill Minestrin FE on the same day... but my period normally lasts 4 days. I just got off it yesterday. Which makes my period 6 days long and I have bad cramps the entire time. Anyone have this issue when starting? My sex drive has also been nonexistent since I started it. And normally I’m super into sex, even on my period.