I am having a problem with insomnia -- the kind that keeps me up til 5 a.m.!! But along with it, I can't stop eating. It's like I am a bottomless pit, and there is pain in my left-sided abdomen and chest, mid chest, and my back, sometimes others. I am already supposed to get a sleep study for day time sleepiness, but what could make me so uncomfortable/wide awake and what about this pain? I am taking Prilosec by the way for gastritis (possible ulcers), but I don't know. I waited too long to eat breakfast one day this week, but I did take doxycycline that morning, and I vomited a bit. Does this seem like an ulcer? sometimes it's in my middle left abdomen too, but they have done gallbladder and pancreas testing and all were fine when done. I HAVE been drinking more lately. Also, if it is ulcers, is this a possible cause of hunger/weight gain lately?