Excess acid reflex. Revert back asap.

I feel irritation in my esophagus throughout the day and also feel heaviness in my stomach. I feel like belching all the time and get relieved for next 10-15 minutes after belching. Most of the time, food refluxes back during belching (the undigested food). At times, I feel nauseous after eating food and get to puke. Acidity and heartburn is very common for me. I feel difficulty in digesting even the peels of fruits and vegetables (even cucumber's and apple's peels refluxes back as undigested on belching). I feel tired and lethargic all the time. I don't get to sleep enough. I get headaches very soon due to this. This condition has worsen from last 1 month. I have not consulted any doctor so far. I wanted an idea on whom to visit and which tests should I undergo for this. Kindly revert back asap.