Do I have IBS or just stomach acid?

I'm a 19 year female and basically for a really long time I've been experiencing nausea really bad I haven't been vomiting but at night when I lay down it's like I'm about too. I'm constantly burping and my stomach feels full of gas all the time and I suffer from heartburn I always have had these problems. I ended up feeling so sick one night that i couldn't sleep and it lasted for about 3 days just constant nausea and mucus type stuff was coming up my throat sometimes (not vomit) i had a burning in my throat also. I went to hospital and they said it could be IBS with the stomach pains. (that are completely barable compared to the nausea. I was given some anti sickness tablets and IBS medication that helped. that was about 2 months ago and for about 2 weeks I've been experiencing it all again not as bad but a lot more heartburn. Antacids don't help and i've heard they make it worse. I don't know what to do to get rid of this nausea and heartburn and gas in my stomach! I don't know if it's IBS or excess acid or both. could someone please help me or tell me something i can do that will help me sleep? I'm starving but i know that eating late at night makes it worse but could i even have some toast to soak up the acid to get rid of this burning feeling? anything is appreciated thankyou

[Kdmich]

I have a similar problem and the doctor still don't know exactly what's causing it. She put me on Omeprazole and I felt like it made it worser..I quit taking it after 3 weeks cause they worsened, plus it gave me watery diarrhea. I've gone 2 days without eating cause it hurted so bad. I was afraid to try to eat anything. But I found out yogurt helps a lot, having soups, and only meat would be chicken that actually felt good in my tummy with no issues.Grains actually worsened it and I though it would help :/ I haven't gone back to the doctor since the last prescription..kinda gave up on it due to I am uninsured and keep on throwing money out there on doctor visits and prescriptions.