If you have a history of diabetes, high blood pressure, or have had a deficiency in B12 then definitely get in touch your doctor! They will need to check you and use the correct course of treatment.
If the history does not exist then an alternative is to call a pharmacist (their advise is always free!). They can suggest what to take to help you and if its truly necessary to see a doctor.
I do suggest lots of fluid and light to liquid meals. Jello, ice pops, ginger ale, 7-up, sprite, and even gatorade will help a great deal. If you do a liquid diet for a day or two it'll prevent dehydration and allow your stomach to settle down. Also, if you start vomiting with just liquid in you, its less traumatic on your system then trying to get rid of solid material (meat or veggies).
Get well soon.