Ahh, I've noticed the same with myself. I'm about your height, and for the last couple years have been feeling heavier at 115-118 (I was under 100 in high school). Been focusing on eating healthier, and I'm back down to a more comfortable 112 or so.

I should probably exercise more than I do and get in the habit now, as metabolism slows with age! Blah.

Yay for you reaching your goal!