Yes the acv will work for acid reflux, I'm living proof.
I was also once diagnosed with acid and prescribed 'Prilosec'. However before I could even begin taking it a cousin of mine suggested I try acv. I used the acv for two weeks, taking a tbsp every night before bed, and before I knew it the acid was gone. No more sore throat, no more raspy voice, nothing. So definitely give it a try.