eating much less at 9 weeks post op than at 1-3 weeks

Hi- I had the Fobi Pouch RNY lap last August. I was able to eat 1/2 C cottage cheese for example, or 1 SF jello and 1/2 an applesauce for a meal. But now at 9 weeks post op I can only tolerate a tablespoon of cottage cheese for a meal.  It is hard getting all the vitamins down, basically I crush one and take it with water, once an hour. I am full most days just from taking the vitamins, but I still eat as much as I can from the plans my Dr. gave me. I just have been concerned that I am able to eat so much less before throwing up or having chest pain because the food is sitting in my throat.  Has anyone else experienced the pouch getting smaller? I have a check up appt in a few days and I think will ask them to do some labwork. 

Thank you,
Susie