Sick sick sick! Any help/advice PLEASE

My immune system sucks in general and is obviously worse when I'm pregnant. Im 23 weeks pregnant. Everyone around me has gotten this bug I have but it has only lasted them a day or 2. It's been almost 2 weeks of diarhea, about 10 of those have been spent with a painful upset stomach accompanied by heart burn, 3 days of puking. I had almost 2 full dsys of thinking I was okay and then right back to it yestedday/today. I cant eat, drink or function. I'm exhausted beyond exhausted. I'm in college and havent gone in almost the 2 weeks (I've kept up on work as it's all mostly online) but I have 2 kids and thank God their father and grandmother have been so good with helping. I literally move and I get sick or have the poops. My body aches I'm drained and just want to feel better. Anti nausea pills that are safe to take dont work what so ever I just puke them up like i never had them. Some how I have stayed hydrated but quite honestly I have no idea how. Any suggestions plllllleeeeeassse