Serious nausea / Vent

Hi ladies! This is my first pregnancy and I am almost 8w. I've have horrible nausea (no vomiting) since I was 4w-5w. ALL day long. It's driving me insane! And making me so weak. I've tried lemons, sipping water, ginger ale, trying to choke down toast/saltines, tums, and watermelon all with the same outcome..no relief. Also incredibly dizzy, super fatigue, heartburn, gas, and cramps. Don't get me wrong, I'm so happy I'm making a life inside of me right now, but am I missing anything I could be trying? I'm losing a lot of weight because I can't choke anything down and am going crazy. Any advice is really welcome at this point.