That's the acid coming back up into your throat, I've had that tonight too because I over indulged have you tried the dual action Gaviscon? Its when acid is REALLY bad that you get this severe reflux. I suggest you have a look at your diet and see if you can identify any trigger foods. I'm trying to be healthier as i live on crap and it just makes it worse. Some say drinking milk or having yogurt help, i find it makes mine worse so i sip water instead.

I hope this helps a little bit, i can completely sympathise with you