I got seabands too and they do work a bit for sickness. Not 100% though
Coke I found good for a sugar/energy hit, salt and vinegar crisps and toast I could eat too.
I found eating little and often helped, but tbh I dont think there is a magic cure for sickness/helping you eat. Its just one of those things you have to put up with.
Im almost 14 weeks and still feeling sick. People lied to me when they said it would be gone by now. Hopefuly you will be lucky and in 7-8 weeks
, you will be feeling better... for a couple of months anyway!