I am waiting to hear  from a breeder if her girl is pregnant( after one slip mating) so chances are slim but i called today to see how she was doing and she said that she was a bit more lethargic than usual but today she brought up her meal but said that normally morning sickness was just frothy bile and not an entire meal.Is that the case or can morning sickness make the bitch actually properly vomit?Im probably clutching at straws here but have waited so long for a puppy,im hoping it is actually pregnancy sickness.

You don't say how long ago the bitch was mated.

Bitches vary so much, nobody can give you a hard and fast rule.  My girls just don't vomit.  They go off their food, so obviously feel "icky" but I get no sickness.

My girls don't usually go off their food completely they tend to pick at the food,  but have the frothy bile rather than a meal back.

If she is pregnant she will be 4 weeks tommorrow.