embarrassed to go to the dentist

I haven't been to the dentist in about 3 years due to the fact that I haven't been able to afford it, but I'm set to go in the next 2-3 weeks. I'm embarrassed bc I have a bit of plaque and buildup and I don't want to be scolded by the dentist. I brush twice a day and floss but idk I don't want them to think i'm dirty/nasty