PCOS and losing weight

I was diagnosed with PCOS back in 2003, since then, I have been on metformin. 2 children later, I am focused, and ready to lose weight. I've been back on metformin since I was done breastfeeding my daughter. I've been on the max dosage (2000mg a day) since February - I take 2 pills in the am, and 2 at night. I have my good days, and bad days when it comes to the metformin, stomach issues mostly. A friend of mine and I are doing P90x, we have been doing this for 2 weeks now, and I'm counting my calories, and so far I have lost 5lbs. I feel pretty good about that, but I'm worried if it's going to keep coming off like this. Last year, I worked out and ate healthy for 3 months, but went on vacation and got off the wagon. I only lost 12 lbs in 3 months, and I working out 2 times a day, and became very discouraged...working out that hard with very little results. I'm hoping I don't experience the same this go around. I am very motivated, and feel really great working out with a friend...we will just see how it goes.

Anyone else with PCOS, how has your weight loss journey been going, and are you on metformin?