Food reaction

Vy

So my baby turned 4 months on the 5th I started him on oatmeal like a week before that and slowly introduced some fruits apples bananas pears he does great way better with the spoon then my other two kids were in the beginning well Easter was his 3rd time having bananas and about 5 hours later he was screaming I couldn’t console him he just kept crying and being gassy and sptitting up. I gave my two other kids oatmeal and fruits early as well and nothing ever bothered them except my 2year old is allergic to strawberries but that was hives not stomach upset. I’m just wondering if anyone else has ever had something effect there baby even if they have had it multiple times before?