Two weeks ago i started to get small blisters in my mouth, at first it didn't really hurt, but its getting worse. could this be a food allergy?

Not really: Unless these symptoms are directly related to something that you eat, could be aphtous ulcers starting as small blistering, food allergy or even oral allergy syndrome don't usually cause blistering, see your dentist or your doctor for examination

Allergy unlikely: Unlikely to be a food allergy; more likely a sensitivity to a toothpaste or mouthwash. Could be viral or bacterial - you should see a dentist to get a proper diagnosis.

Unlikely: Have you recently changed toothpaste, mouthwash, or a food that you eat daily? It's more likely that what you describe as blisters are caused by a virus. Please have your Dentist examine you and then discuss a course of treatment.

Many causes: There may be many causes for these. Must see them clinically to begin to diagnose the problem and cause and therefore the correct treatment. Often it can be a change in toothpaste,mouthwash, or whitening strips/gel. Best to see the Dentist for an examination and diagnosis and your treatment options. 2 weeks is plenty long to wait. Make the appt. this week and get better. Good Luck.