W/O BREASTPUMP ADVICE PLEASEE!!!

so I forgot my breast pump in ATL at my aunt's house.. stupid? I know it is. but I'm going to the WIC office to get a new oneonday but I HAVE absolutely NOTHING to pump with tonight and won't have anything monday.my mom told me to hand express but I can't do it I've tried times before. is milk going to dry up? will it keep flowing after I pump on Monday ? I'm praying they give me one Monday because I don't want my baby fully formula fed. should I call his pediatrician? idk what to do please help and please add any tips or advice. I don't have any money to just go buy a whole new everything either btw