Hi lovelybones25,
Without you being examined by a doctor and having the family history you described, it could be any number of things. Have you ever heard of gastric reflux? It is when there is to much acid in the stomach causing it to revert up from the stomach to the throat, thus forcing you to vomit. You could have an ulcer, there could be an inflamation in the intestines, you really do need to see a professional and see if you can work out a payment plan, your health is to important to wait another 5 years before seeing a doctor.
Good Luck,
Faded Rose,
P. S. you can also call any doctor office, explain your symptoms and see if you can get any ideas. Any pharmacist should be able to recommend something as well.