breastmilk allergy, colic or reflux?


Hi all, I’m new here and badly needed help/advice.

My baby is almost 3 mos old now. I have been exclusively breastfeeding, and it’s never been easy. I’m thinking my baby got breastmilk allergy on the early weeks, so I changed my diet but didn’t work. she still cried 4-5hrs at the same time, thinking it’s colic. Even the doctor said it’s normal for babies to do that and it will just go away in time. But now, my baby cries every feed! like for the first swallow, she will stop and cried really loud and sometimes screams! it will be like that for 20mins. I tried to soothe her everytime, she’s very hungry so she still wants to latch but then she will stop scream and arch her back. I feel so bad when I’m breastfeeding her, I just don’t know how to help her . she never vomit but it’s like she’s acting she got reflux???

I am so drained. I just don’t want to go to the doctor and she will just tell me the same thing that it’s normal.