Love your ticker Jessie! The sore hips is probably from the lack of support from the toilet seat. When we sit on the toilet, all our weight is taken up in the pelvic region which could cause the pain. The ideal toilet seat would provide even weight distribution across the whole area, but it just isn't possible considering what we want to do! Try and keep an eye on your posture and don't hang around too long.
I'm hideously embarassed about my knowledge on this topic. I had to write a paper on it for Uni once, the things we learn hey?
MG