So so worried now

I know I'm on here alot I've recently.had my blood done a full count and all clear but I'm getting awfull burning in my stomach and I'm constantly.feeling hungry and thirsty all the time last week went from being full from a meal to eating all the time and drinking all the time and feeling.like my food is going out of me and my drink and I've droped 4lb this week and back and stomach pain and my.bloods are all normal.need some advice