How Can Stomach Pain With Constant Vomiting, Motion Sickness Be Treated?

ive had persistent stoamch problems for nearly a year, it started from 27th decemeber, where i did go on a drinking binge the night before. Since then ive been constantly in pain with my stomach. To start with i was throwing up 5/6 times a day retching constantly. Ive had a barium meal, ultrasound and endoscopy plus blood tests but still nothing shows. Most recently happened sat, i coached football in the morning, played in the afternoon, got home then fell asleep, woke up an hour later feelin ill a feeling which can only be described as motion sickness. Its getting extremely depressing now as it restricts my social lifestyle. I quit smokin for 6 months, have hardly drank this year as i need a full day to recover, have tried avoiding wheat etc...........any ideas?