Skipton her DH does actually have a point because OPs body will have used much of her reserves of vitamins and minerals already during her pregnancy as she was unable to eat a balanced diet throughout due to sickness. Her milk production will be further depleting her reserves. It is very important to make a huge effort to replenish them or she risks becoming seriously unwell, and eventually her milk production will be affected. It happened to me. It's a serious issue.
OP, we all have a very strong association between sickness and food aversion. It's evolutionary. The body tells us not to eat things that make us sick. So, having been so sick you need to try and overcome this. Some of it will be down to hormones, but a large part is also an association thing. I still can't eat cod without feeling nauseous as for some reason it made me wretch when I was pregnant. Given I can eat pretty much anything else I just avoid it, but when all food are making you feel bad then you are going to have to try and eat a good range for your health, and to keep your milk supply up.
Also, having not eaten 'normally' for such a long time your stomach will have shrunk. It's almost like someone recovering from anorexia. It's a case of starting with small meals you can manage and trying to increase them gradually.
Once I recovered from pneumonia I made a massive effort to get my food intake up, and include a balanced range. This in itself meant I didn't feel as sick and tired so had more appetite.
Please try and see things from your DH's point of view, he isn't a bad person, he isn't controlling, he is probably frantic with worry about you. He'll be able to see just how run down you are.
My advice is tiny meals regularly. Don't stretch your stomach with a big meal, it'll make you feel sick.
Continue taking a multi-vitamin tablet and omega oil tablet. Pregnacare do a dual pack specifically for bf-ing mothers.
Try and increase the range of food you are eating. Eggs are brilliant, and high is choline which is essential for your baby's brain and nervous system. If you can't manage them as is, would pancakes be better?
V rich food are nauseating at the best of time, let alone when you are recovering from HG. Avoid them. An energy dense flapjack style nutrition bar (boots sell ones specifically for expectant and nursing mothers) might be better.
Hope you feel better soon. It's miserable 