For two months now i've been nauseous no pregnancy. whatever i try only works for a fews hours at most. what can cause this?

Many things, like...: Motion sickness, Pregnancy (not you?),Medication-induced vomiting,Intense pain,Emotional stress (such as fear),Gallbladder disease,Food poisoning,Infections (such as the "stomach flu"),Overeating,A reaction to certain smells or odors Heart attack,Concussion or brain injury,Brain tumor Ulcers,Some forms of cancer,Bulimia or other psychological illnesses,Gastroparesis or slow stomach emptying.

Time for evaluation: Could be lots of things and needs to be evaluated by a doctor. Could be what you're eating, some sort of an allergy or reaction. Could be something hormonal, something in the stomach. Not too smart at this point to continue trying to treat the symptom without knowing what the problem is.

See your doctor: for a workup and stop guessing. Once the cause is found then appropriate treatment can be given.