Out of birth control

Ok so .. I took my last birth control pill last night, usually I always get a pack of 3 from cvs in advance the pharmacist tried to tell me I'd have to wait like a week for it, but I insisted he try to give me it tomorrow . 😅 he's gonna order it so he says. Upset with his response saying 🙄 try a different temporary solution . Such as ... plan b . I had sex with my sons dad no condom we never use them we have a 3 yr old . We should use them still but don't. So now my thing is this. Do I double up on birth control tomorrow after getting them at 2pm immediately or what ? . I already have irregular periods and thought I was late this month smh . Not pregnant . But pissed my birth control is hard to get right now what the heck