From scientific point of view, it's totally wrong for you to go to bed immediately after eating because the food you've eaten has not been broken down(digestion) to small absorbable units.
Going to bed immediately after eating leads to so many health related conditions such as heart burn, indigestion, constipation, and ultimately slow metabolic processes.
If you go to bed once you finish eating, you put yourself in a state of where you experiencing slow response to metabolic activities which in turn would cause you to have sleepless night, as well as you becoming prone to weight gain.
I guess you don't need to be reminded about the dangers associated with weight gain,do you? It is considered as health sabotage to go to bed immediately after eating due to the few but vital reasons stated above.