Hello, I am Dr. Peter a licensed Veterinarian. I would like to help. I need to ask you a few questions to be well informed and give you the best advise. There is no additional charge for information request.
1- How long has this been going on?
2- Did he get into anything or eat something out of the ordinary?
3- Take a look at his gums and see if they are pink like yours or pale?
4- How often is he vomiting?
If the stomach is not getting larger than it is not a bloat. When a young dog vomits so frequently as you have described the big concern is a possible foreign body, pancreatitis, infection, etc. If you have access to an ER vet, it is best that she is seen tonight and not wait. It is important to rule out things like pancreatitis as it can be fatal. In the meantime, remove all food and water. Follow up with ER veterinarian.
Hope the above helps, if you have additional questions I will be glad to answer them.