The pill Weight gain and slowed metabolism

Hi,
I was on the pill for a year before realising it made me gain lots of weight and caused lots of other side effects. And I switched from one pill to the low dose oestrogen pill which did the most damage. I've stopped it now but I've gained over 2 stone and it's extremely hard to lose weight especially with my metabolism being so slow now. I just want to now if anyone was able to lose weight and get a better metabolism again after exercising and stopping the pill? And did you get back to close to your old figure? As I can't fit into any of my clothes anymore and I'd like to in time. It's really knocked my confidence and I don't feel myself anymore. Wish I'd known