Depressed and severe morning sickness

Hi, I'm new and not sure where to turn.
I'm current almost 12 weeks and have been suffering from severe morning sickness since 6 weeks.
I vomit multiple times a day, struggle with simple task, lost my job and haven't been able to help my husband look after our household or our 8 month old either.

I've been on all the medication including all at the same time but it hasn't worked.

I'm feeling really depressed. I can't be a wife or mother and I feel like such a burden. My husband has been great and both our family have helped a lot but I can't get over feeling like I'm a huge let down.

I'm not bringing in money because I couldn't work and then lost my job. I'm not looking after the house because the smell of everything makes me sick, I'm not looking after A, our son because I'm so tired from the medication and the vomiting. What am I supposed to do?

I'd love to hear other people's experiences and how they coped. I can't go on feeling like a burden much longer.