Feel super sick

It’s so hard to explain😩 I use to be able to eat a lot now I can barely eat anything it’s like I get full faster after I’m finished I feel nauseous even before I eat I always think to myself maybe i should eat but it doesn’t go away ☹️I don’t feel like my normal self no more I just started feeling like this a couple days ago going on to 7 weeks the worst part is I don’t even know what symptom this is or if it’s ever gonna go away. Yesterday I was burping so much sometimes i felt like I was gonna throw up while I burped 🤢💔 I also forgot to mention that i get this weird burning feeling inside my stomach 🤦‍♀️WHAT CAN I DO TO MAKE THIS GO AWAY ☹️💔