I too had terrible heartburn, but not so early. I found that every night because i was tired i would have tea then lie on the lounge to watch telly, of course this was the worst thing i could do for the heartburn! So try to eat tea a few hours before bed and stay upright. also milk arrowroot biccis are good too. And of course Rennies

I really hope you find some relief because it can be really painful.