What to Do After Missing Your I-130 Interview

My husband filed a I-130 petition for me,we missed the first interview appointment ,they require evidence to be submited in-person which is fine,we married over year and half,now I have 6month pregnancy.we missed the appointment because the notice letter was mailed to my apt.on 5,2,2014 afternoon,my scheduled was in the morning @10:15am 5,2,2014.they don't work on weekend so I have to wait until Monday to call them .what should I do ?is there have other chance i can reschedule my interview,how long does it take?

Make an InfoPass appointment and see if you can straighten things out before you get your denial letter and have to incur the costs of a motion to reopen and appeal.