Excessive, constant hunger

Hey ladies I was wondering if anyone else is fighting with extreme, excessive, constant hunger. I can eat and gorge in food almost 3 times what I would normally eat in 1 sitting and still be extremely hungry 30-45 minutes later. I've even questioned myself if I have actually eaten or if I imagined it. It's actually starting to worry me bc I feel I'm eating way too much and baby is still not getting enough to eat. I see my Dr. this Wednesday and will address it with him then but wanted to see if anyone may have some input.