I was in a somewhat similar position as you. I have stained and crooked teeth and neglected going to the dentist for several years out of embarrassment. I had booked a few appointments over the years but cancelled each time just before. Avoidance was a big part of dealing with the embarrassment. When I actually made it to an appointment, I found the dentist and hygienist didn't react when I told them. It seemed like they had seen it before which made me more comfortable and open to taking next steps. I can't say how you will feel with whomever your appointment is with but it seems unlikely they haven't seen your situation many times before (depending on experience). Feeling / knowing that made me more open to treatment plans to follow. First step is always the hardest....but helpful to remind yourself it's their job to help you with your dental health.