The only way is via a visit thru the ER. I know, expensive, but it's your only choice on a weekend. Sorry. Consider it a lesson learned. Always check your medication status at the beginning of each week. This allows the pharmacy time to get doctor's approval on expired prescriptions. I wish you all the best.
That's really rough!!! I feel for you! Definitely go to the ER as soon as you start to feel ill! Try the on call people first but if that does not work go to the ER! it's very dangerous to go without that med.