Help with acid reflux after gastroenteritis

[Sezxx]

I had gastroenteritis about 10 days ago. It seems to have finally settled down. But I have really bad acid reflux since. My doctor suggested I increase my omeprazole 20mg to twice a day which have done for 5 days now but it's still not getting any better. I wake up in morning with a mouth full if acid. Its horrid. I'm also having to take gaviscon in between (2 hours after) has anyone got any other suggestions? I've been eating small meals, only drinking flavoured water, eating plain foods. I saw doctor on saturday and again tuesday and he just said i had to wait it out. Should I go back to my doctor?