Two week appointment

Ka

I’m 30 weeks and it’s my first two weeks appointment this Thursday and I have to cancel due to no one able to watch my daughter. Will they make me reschedule for this up coming week then again for 32 weeks? I already have my appointment set for 32 weeks so if I cancel will it really make a big difference if I was supposed to be seen every two weeks this time? I’ve never canceled an appointment.