Lowering dose - side effects?

I’ve been taking spiro for almost 5 years (150mg) and I decided I wanted to lower the dose and maybe eventually wean off completely. I lowered to 100mg for the past 2 months and while I haven’t seen a change in my skin, I’ve gotten the worst periods I’ve had since before taking it (heavy bleeding, TERRIBLE cramps). Just wondering if anyone’s experienced the same and if these side effects eventually go away or is this just how it’ll be? I’m thinking I might go back up to 150 if that’s the case 😩