Hi Crash,
I know what you are going through, to some degree. I am also a small framed female (45 yrs, 5'2", 117lbs) and I worry all the time. I am 5 1/2 months out of my HR now, and most days I feel awesome! But every now and again I'll have a day where my leg aches a little, or feels stiff, and immediately I think "Oh great, it's failing! This, of course, is totally ridiculous, and I know it, but I am a worrier by nature, and it is hard not to.
I do agree with Pat, though, it is not worth it, and will do nothing to help our hips heal and recooperate. In fact, worrying will weaken your immune system, which can cause a slew of health problems, and will definitely not help us rehabilitate!
Try to enjoy each day. Think positive. Listen to your body. This website is proof that there are a lot of women, small framed and otherwise, that have successful HRs.
Enjoy. Luann