Hi, this is what I primarily study.

To answer your question: no, absolutely not. Nutritional timing pays such little regard into the overall human body composition that unless your job is to be an IFBB Pro, you'll never need to worry about it. Furthermore, no position of sleep has ANY impact on body composition.

There's this dumb notion that you "shouldn't eat carbs after 6PM", this is silly. The idea is that you'll be consuming your calories, but you won't be burning them. This is because you burn less calories whilst asleep than whilst awake. What they fail to consider is the amount of hours you're awake and not eating. Overall, using the Harris Benedict formula, you can find approximately how much energy expenditure you can expect in a day. Eating under that amount of food in kilocalories will make you lose weight. Eating over that amount will make you gain weight. There's 3500 kcals (roughly) in a pound. If you eat at a 500 kcal surplus a day, you can expect to gain roughly 1 pound a week.

Hope I helped. Bottom line: no. No you will not get fat because you sleep a certain way, nor eat right before you sleep.