Looks like my coffee and OTC pills abuse has finally caught up with me. I have had this pulsating, burning sensation in my lower abdomen for the past couple of weeks. I finally visited a doctor two days ago, and he prescribed me what is essentially a more potent version of Zantac. He just stated that an ulcer is a possibility. I have a follow-up next week, where he'll do more tests and take it from there.
As for now, no more coffee for me. :'(