I Had Hiatal Hernia And Fundoplication Surgery Almost Five Months

I had hiatal hernia and fundoplication surgery almost five months ago. I have had to have two EGD done and since being able to start eating more food groups, I am still very limited on what I can have. I am experiencing severe stomach cramping when I eat. It can last several minutes or will cause me to throw up what I have ate. The reason for my question is its getting more intense and I'm getting more limited on what I can eat. I'm concern as to why it seems to be getting worse.