Morning sickness

Any tips to help with "morning sickness"? I am 5 weeks pregnant and have not the typical "morning sickness"...but 24/7 nausea & dry heaving for the past 5 days. I'm miserable and desperate, and the thought of this continuing for possible 7+ weeks is scary. It's so bad I can barely work (have a already sedentary desk job). I will try just about anything at this point....help!