upping cals for the last few lbs

I've been feeling pretty good about where my body has been lately. Still want to lose a bit of tummy fat, but am going to be doing a lot more strength training and will hopefully see more definition. I've been set at 1 lb/wk for awhile now after realizing 2 was unrealistic and not working. I've managed to lose about 10 to 11 pounds (it's debatable where I actually am right now haha) in about 10 weeks. I'm very happy with the results. The weight doesn't come off evenly. It is stuck for a bit and then all of a sudden it seemingly drops about 3 lbs, or that's what's been happening. I think it's going to take more time to lose the last few pounds, and I think I'm ready to stop being so restrictive all the time to 1,200 (I swear, I feel like a slave to that number) and move to a little lower weight loss amount and eventually towards maintenance. At this point, I think I just have a lot of toning to do. I want to up my calories, but I've been at a net of 1,200 (or sometimes less because I don't always eat all my exercise cals or leave some in case the burn wasn't right or I forgot something) for the 10 weeks I've been doing this. I'm afraid if I increase I'll gain. I was just thinking that 1,200 was probably too low all along for me (I'm 20, female, 5'4 1/2") and I'm concerned about my loss being sustainable, even though I tried to do it the right way. How slowly do you think I should up what I eat?