Suggest Remedy For Nausea And Diarrhea

I hit a deer in my car on Nov 17th. No injuries at the time, but woke up the next morning with naseau. This has been going on since the accident and I have actually thrown up several times as a result. The symptoms come and go and include nausea, diarrhea, when I eat, it feels like the food just sits in my stomach for hours and this leads to vomiting on occasion. any ideas?