with my first pregnancy I was sick from 3w 5d (before I got my first bfp) untill about 11 weeks, I was also sick most of the day, but managed tostruggle through the day at work. I am also a teacher, and so could hardly keep ducking out to be sick, I would juuts keep a stack of food onmy desk and nibble away. I would usually throw up at dinner time, then again in the middle of the night, then at breakfast time.
With this pregnancy I have had hardly any sickness at all, i think I have thrown up about 4 times in total, I still get waves of nausea but nothing as servre as last time.