Advice please

Madison

So I’m 38weeks 3days and I have the biggest splitting headache of all time I’m having to like squint my eyes and I just even function atm I’ve had this headache since 8am and it’s 1pm I was told to call my doctor if I had a headache that wouldn’t go away (she told me tht like 3 weeks ago ) but she’s on vacation and I wasn’t given her subs number and the office if closed cuz it’s Saturday what should I do