I went through exactly what you are, it was only during my first trimester! Now at 13 weeks almost 14, I hardly ever get sick, I was the other day but that was due to now discovering that I can't eat chicken!! My doctor gave me some tablets to take the name i don't have in front of me but they are just travel sickness pills. If you get really bad talk to your GP.
If you can bear it then they may not consider doing anything, you see I was bed ridden for almost two weeks unable to eat anything just drink, drinks full of sugar like coke.

I've never had "morning sickness"it's always been more like afternoon or evening sickness, It seems like I always wind up with heartburn or an upset tummy when I'm trying to go to bed, I know your not alone!