GERD acid reflux & Caffeine pills.

Hello Dr, I have GERD acid reflux, the acid reflux typically occurs whenever I just take a sip of coffee but it doesn't happen with my ctc tea and other foods but with only coffee, I took nescafe but it gave me very bad esophagus burn felt something stuck on my throat. If I still take it regularly my stomach will hurt and the reflux in esophagus wouldn't go away untill I take a Eno and burp then the reflux starts to slow down. But if I take coffee the next day again esophagus burn no matter however I brew it. But I study everyday 10-12hours and it's hard to focus from the afternoon with the drowsiness so I was thinking if coffee can't be consumed as beverage then can I take it as a capsule form? Caffeine anhydrous?? To stay alert and focus from afternoon as well without getting drowsy ? I really want to keep my focus on top notch but everyday I get drowsy from afternoon even though I take 30mints nap I still doze off and no focus in the evening. Dr plz help me plz I'm preparing UPSC.