I have been though far, far worse. First of all explain to the landlord why you may be late with the rent. Don't just blow it off and not pay. And I am a landlord and will take a reasonable explanation as to why they may be late.[i had a renter say to me "I can't pay-what do you what me to do-rob a bank?" Wrong answer, eviction notice.
Past due? Generally no action is taken[shut off] till 90 days. Pay the oldest bill first-that puts you at 60 day's and buys some time.