Morning (all day) sickness

I’m in week 8 of my second pregnancy and I’ve been feeling all the morning sickness and fatigue since I was 4 weeks pregnant (2 weeks after conception). I don’t know what it is about this pregnancy but I constantly am feeling like I want to vomit and I can sleep for 16 hours per day and still be exhausted. I can eat maybe 1 meal per day but anything else is so off putting and gross that I gag just thinking about anything else. We had our first appointment last week and we are only expecting 1 baby. I need some help to deal with this nausea for the rest of the 1st trimester. Help!