Traveling help

I'm alone with 2 kids... 3 and 1 yr old... I only have a single stroller not a double and cant get one.. as I'm in a different country I was suppose to go back with my husband but left early for work unfortunately he cant come back ... I'm pregnant also and cant use a carrier I'm assuming from my other post ... do I just leave the stroller and make my 3 yr old walk and hold my baby in my hand or take the stroller and switch off kids I'm confused never traveled alone ugh freaking out..

I know to bring snacks and toys to keep them busy it's just in the airport how to deal with 2 kids under 3 help any tipss...