Is diet the only thing to stop this? gosh..

Ok,

For the last 2-3 weeks ive been having problems with acid coming up in my throat and tightness in my back and stomach. I woke up this morning and had this awful burp taste in my throat and it wouldnt go. My stomach also felt really sickly. THEN,all week ive have this tightness in my stomach and back. Not sure if its constipation or cramping or what. It seems like its stomach related or something,not really muscular. Its been STRESSFUL week. I bought a new car and the insurance is LUDICROUS! So,I was stressing out about if im gonna be able to afford the car every month. Not as stressed as I was couple days ago,but im sure it didnt help things any. ugh. The tightness is worse at work. My whole stomach just feels TIGHT inside and my back. So not sure if acid reflux is doing a number on me or not.

Any help would be appreciated...not sure if anyone knows any remedies or little things to help or anything.