Morning Sickness is HELL!!

I was so happy to finally get a BFP, now all I do is live in a constant state of misery. The sickness began at 5 weeks and now at 8 there is no relief in sight. It's hurting my job and my relationship with my hubby. I cry because I want to feel happy and enjoy this but it's so hard! I'm always nauseous so I can't eat much and end up dry heaving because there's nothing to vomit. I've tried Zofran but it's not that effective. I don't know what to do ?