Good Morning, I believe you were drinking but if I remember you were also vomiting? So you most likely were losing fluids and unable to retain your replacement fluids.
There are other causes for dehydration so it would not hurt to make your appointment with your regular physician as you want to see him. Just telling you by phone that you do not need to be seen is not the correct response from his office. Call and make an appointment.
You are your own best advocate so please take charge and get to the clinic.
Take care and keep posting. Hugs to you.