Hey So For The Past Few Years On Some Nights

Hey so for the past few years on some nights I'll be watching TV with my dad in the living room and I'll start feeling really tired so I fall asleep but I wake myself back up and when I do I smell something like toast or frying food. It's been happening probably since I was about 14 or so and I'm 18 now. What could it be? And what should I do?