Wide awake 😳

It's 2am at my place here. I went to bed at around 9:30pm and till now I haven't fall asleep. During these 4 1/2 hours, I keep on going in and out from my bed room, grabbing some crackers and milk when am hungry, in out from toilet. When I lay down on my bed, my chest is uncomfortable and I can't seem to find a comfortable sleeping position. I wonder what makes me feel uncomfortable when laying down 🤔 heartburn? But I don't really feel the burn but just like having some kind of pressure on my chest and I'll have to sit up, and when I lay down again, the pressure comes back. Omg! Will I ever fall asleep tonight? 😭