Digestion & Vomiting

Poppy
I've had "morning" sickness since probably week 6 and I'm in week 12 now. I have nausea pretty much 24/7. I have scripts that sometimes work and sometimes don't. I don't vomit daily. 
I try to eat snacks between meals.  At times it's hard to tell if I'm actually hungry or growing more nauseas.  
At times when I eat my snack I'll end up feeling worse and will throw up some of it. Just occasionally. Does anyone know why this is happening? Is the digestion so slowed that my main meal (several hours prior to the snack) still hasn't left my stomach? Example: I ate lunch today around 11. I had a sandwich. Several hours later I ate a single serving of apple sauce then some yogurt. About an hour later I throw up the yogurt and it came up so easily. My body didn't struggle at all. Plus it appeared lettuce from my sandwich cane up, too. 
Anyone else experience this? Any suggestions?
Does anyone else just wanna feel normal again? I had an appointment today and my OB said the sickness should be ending soon and I should feel better.  I told her my co worker said she was sick the first 6 months. My OB said don't listen to my co worker; I know every pregnancy is different. I will be a FTM. I am thankful for this gift God has blessed me with and I feel so guilty for wanting to feel normal again.