spitting up too much 🤦🏻‍♀️

Annabella
Okay my daughter is now 11 weeks old I talked to my doctor at her 2 month appointment about her spitting up a lot and how the milk doesn't seem to fill her up and I thought she was colicky 
. He suggested gripe water cereal/oatmeal and gas drops. Well we give her gripe water through out the day which worked sometimes and the gas drops it's hard for her to get the cereal out her nipple even when we opened the nipple hole more. 
Now every time she gets her bottle it came to the point where she spits up lie 5 -6 times after eating. It's really scaring me 😔I thought about to going back to breastfeeding but I don't even know what my supply is like. I barely eat that's why I stopped in the first place 
What should i do? Take her back to the doctor? Should I try to breast feed her again?