Doctor question! Please help

AF was originally supposed to come on 1/4. However, I didn't ovulate until 12/28 so I'm assuming I'm going to have a longer cycle (unless I'm pregnant this month, which I'm too scared to test). Glow changed my AF prediction to 1/11. I had set up an appointment with my obgyn for 1/13. I booked a month in advance because she's always booked early and I made sure I booked on a date that I WOULDNT be bleeding. If I do start my period (hopefully not and there's a baby) should I postpone it? I originally wanted to go and just have tests run and get checked to confirm if I was healthy and I was good to go as far as having a baby. But I'm guessing she will have to check my lady parts so that won't happen if AF comes. So... Should I still go see her if I start, or will she not be able to do much and I should just postpone?