Problems Digesting/Holding Down Food

I am on week 14 after surgery and have lost 30lbs.  In the first few weeks I had no issues with holding down or digesting food.  I stuck with the liquids and mushy foods.  Once I started eating solid food digesting has become an issue.  It seems that eating any time of bread, pasta or carb it gets caught and I end up throwing up.  I also have a very hard time digesting certain proteins such as chicken or shrimp.  It seems that I am throwing up daily now- it's like a trial and error as to what I can eat.  I know that this is not a good sign and definitely causing damage to my body.  So I am looking for a nutrionist or anyone post op to recommend what kinds of food are easy to digest.   I'm also looking to hear from people what seems to have worked for them and helped them lose the weight after the surgery.