Ellie, that doesnt really happen to me, although it probably does hapen
When opening the fast you dont need or shouldnt really go and fill your stomach up or eat all night - there wouldnt be any point in fasting, il probably open mine with a glass of water or with 3 dates then eat later.
One thing i dont like though is eating in the morning and then going back to sleep, theres a yukky sickening feeling i get when i wake up