Doctors Appointment

Hi! I am a little over 4 weeks pregnant ( I think) I have had a doctors appointment with my OB scheduled for tomorrow for the past 6 months --- i haven't told them I'm pregnant yet as i don't want them to cancel my appointment and tell me to come back in 4 weeks. I've had two miscarriages so I'm simply just nervous .. will they make me reschedule tomorrow after I tell them or will they still see me?