Is It Normal to be Able to Stand Almost Straight 3 Days Post-Op Full TT?

Just wondering if I was the only one with this problem but i can stand near close to straight.. I hve a full tt and it has been 3 days since my surgery. I can't stand up perfectly straight but I have a bit of a hunch. I notice if if my pain med is wearing off, it hurts to stand straight, but I am able to physically do it somewhat. Is this normal? Why is is that so many women can't stand up straight at all or not even close and I am able to?