KM, another possibility for you could be an IUD. From what I've heard these are great for women who have had a bub (something to do with the uterus changing post-natally) or suffer from PCOS. I think you fit both categories!

Do some googling - my sister just enquired about getting one and it has to be done by a gyno so you'd need to see your GP for a referral first.

From what I've heard from my two fiends who have had implanon, neither of them seemed to gain weight but they both had somewhat negative experiences...

One of them spotted continuously while she was on it and the other one had a similar experience to Keike, it messed with her mentally.

Good luck with your decision...