My Stomach Has Been Hurting For Almost 6,7 Weeks Now,

My stomach has been hurting for almost 6,7 weeks now, both when I eat and when I don't. Almost all day long and at night my stomach CONSTANTLY growls. I have regular bathroom habits, no diarrhea, no anal bleeding, no vomiting but I often feel almost a kind of an acid, nausea type feeling, not all the time but often. My diet is not the best; I don't eat fast foods or fried foods, but due to financial reasons I do eat once a day, bread or gluten pretty much every day (sandwich or some sort of a wrap). I do drink coffee every day, but last 2 weeks took a break and mixed it up with peppermint or mint tea instead, still had coffee a few times in between thou. I drink alcohol, beer, whiskey but not every day. I'm 30 years old and the last 3 years of my life have been probably the worse ever, so I've been extremely stressed out. I eat sugar from sweets but only once a week. I haven't been eating a lot of fruits and veggies in the past year, some but not too many and as often as I used to. I am perplexed and I don't know what to do.