Are you eating enough fat? What do you dress your salad with?

As stated, you're pretty close to goal, it's going to be harder and slower for you than for those of us with 100+ lbs to go. It could be hormonal, could be the cheese, could be the artificial sweetener in the soda (for your sake I hope it's not that, I don't do well without my diet soda!). I'd up the fat first, then try cutting out the cheese.