My pup has been vomiting and has had diarrhea for two days. She has eaten grass a couple times while being sick but throws it back up to. I got her to take a little water tonight and some shredded chicken from a nugget because she wouldn't eat it when it was in a bigger form. Of course, she has vomited twice since she ate and drank last. Her diarrhea has been mucous like with just little form to her feces. It seems like there may be something blocking her from having a reguler bowel movement. Do you think she ate something she should not have, like my children's toys or something. If so, what's the odds of her passing it eventually?

Get pEdialyte. Give this to your dog in small portions. It will start to re-hydrate it. Your dog is not retaining the water and is just getting water logged. My dog likes the grape flavor. :) this will help put electrolytes back in your dogs system that it needs. 24 hours of this will more than likely help your dog out tremendously! Hope this helps

Also, my dog did this when he ate his own feces. Some breeds do this, because they know they will get in trouble if the went in the house, so they hide it be eating it.

Vomiting could be caused by many things, from stomach upsets to blockages to diseases of the organ systems, best to get her checked by the veterinarian.
Good luck, I hope you get her sorted out.