Morning (and all day) sickness

I'm 7 weeks 3 days from LMP and I have been so nauseous for the past 3 days. I've tried it all. Ginger root capsules that my doctor recommended. Eating several small meals throughout the day. Sniffing Lemon and peppermint essential oils. Eating plain or bland things like crackers, teddy grahms, applesauce, bananas, ice chips. I feel like I have tried everything and I cannot get any relief. I feel like I have a stomach virus without the vomiting. But I almost think if I did vomit I would feel better. Any suggestions? I've been awake all night the past 3 nights I have been so sick and I can't get any relief.