How far did you go? That would pay a factor here.
I know for me, I cannot go into a bike ride with food in my belly.
For a Sunday morning ride (12 mph average, 30 miles), I will consume around 300-500 calories 30 minutes before I ride... not a specific plan... it just happens that way since I eat as I drive to the ride. Then I eat around another 200 calories on the ride.
When I am going to do a longer and harder ride (faster average), I keep with the 500 calories, but I eat more while riding.
I know for me, I can eat and ride at the same time. Sure, it's not a HUGE meal... but I snack on peanut butter crackers... and shot blocks. My tummy always feels fine. But I can't eat and go run, or eat and go swim. So, it's not that I have an iron stomach.
Also, if I haven't consumed enough calories pre/post ride, my body will FEEL it. Just an over fatigued feeling. One time, I wasn't hungry after a fast paced 30 mile ride, so I just went to bed. MISTAKE! The next morning, I was so fatigued, I almost couldn't get out of bed for work. Just walking up my stairs winded me.
So, maybe look at your diet a little closer and find what works for you. Good luck!
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"