Don't worry, you are doing fine. It took me 6 weeks to lose half a stone, then I put on 1.5, despite sticking to plan, and it took me 2 weeks to lose that, so it took me 9 weeks to get there...
It does come off, and 1 to 2 pounds a week are the healthy amount to lose.
Everyone is different but to boost weight loss, I ate a lot of superfree foods, drank a lot of water and only ate when hungry. I also cut down on fruit and muller lights. That got me going to a faster weight loss. The last 6 weeks before reaching target I lost 1.5 to 3.00 a week, with one week of a pound loss. I had no gains and no STS. Prior to doing that my weight losses were much slower, being a pound here and there with a few small gains and STS, but all in all it took me 30 weeks to lose the 30.5 to my initial target.
Good luck!