Sickness, feeling down and a unsympathetic boyfriend. Help?

I've been off work for the past 3 weeks with bad sickness at 10 weeks, I'm not dehydrated enough to go to hospital but it's still so bad. The tablets make me drowsy, I'm lucky to keep half a sandwich down each day and don't really move from the sofa. My boyfriend isn't happy with me for not eating or going out, he's said I need to force feed myself and force myself not to throw up, something I can't really come to terms with, HOW exactly do I stop myself from being sick? He says I'm being lazy and its just excuses when really I just don't have the energy. He's now said that I need to eat and if I don't get up and get ready so we can go out for food then he's done because he's fed up of me being so lazy. I really don't know what to do, nobody seems to understand how draining it is, I don't want to be like this it's not something I can help. Any advice on the boyfriend situation? Being called selfish along with everything else because I can't eat isn't something I want to hear.