1st Trimester Weight Gain?

LaurendaMB

Does anyone know how much weight, if any, we should gain in the 1st trimester? I am a little worried, because I thought by 7 weeks I would have put on at least a pound. I in fact, have been losing weight. I am a petite girl, normally weighing around 117lb (5'3"). I am now down to 113lb. I don't remember the last time I saw that number on the scale. I have had NO appetite, so I know I haven't been eating as much as I used to, but I know I am hitting at least 1200 calories a day.

 Should I let my OB know I've been losing and not gaining?? Or is this fairly common??