Burning in throat & feels like something is there when I swallow & bitter taste in mouth. Has lasted for 4 days. Can acid reflux to last this long? N

Maybe, but... Could also be some other cause for the symptoms. One's doctor can check. Throat pain can be from a strep throat infection (antibiotics are needed), a cold or influenza (antibiotics usually not used), or from some other cause such as allergies or irritants. Usually, a person sees the doctor if the sore throat is bothersome, recurrent, or doesn't go away quickly (mainly to check for strep throat).