This is driving me crazy. I haven't had sex in 6 months, I have all symptoms of being pregnant, nausea, always sleepy, cravings, smell of food makes me sick, a little weight gain. However, I haven't missed any periods, been to the hospital a few times, had ultrasound done but I'm not pregnant. No One seems to know what it might be. Has anyone else been through this? Any suggestions what might cause what I'm going through?