Loss of appetite and severe nausea/vomiting

Currently 28+5 and I've recently started to experience loss of appetite and severe nausea/vomiting. It's been going on for about a week now. Is anyone else going through the same thing or can something be wrong? Yesterday, I only ate lunch and not much. I couldn't eat dinner because of the nausea. Then I started vomiting, after I got so light headed and weak.. I kinda scared my husband. I even vomited so hard I busted a few blood vessels in my eye. I try to drink water and lay on my left side but minutes/hours later the water comes up. Haven't been this way throughout my whole pregnancy, why now? Advice/help needed in this case...