I have really not had anything to complain about during this pregnancy. I feel great 90% of the time. This back pain today hit me out of absolutely no where. it is not sciatica. This is in the middle of my back going side to side. I am a teacher and we had all our holiday parties today. I am usually on my feet all day and was again today. Is it possible that so quickly I could just not have the stamina for that, or does it sound like i might have twisted the wrong way? Legs up with a heating pad for now. Very grateful for the next week off.