please go! think of how great you will feel with a brand new smile. ask friends and relatives to recommend a dentist and stop in and look around the office and meet the people before making the appointment. find a place you feel comfortable. a good dentist will understand the courage it took for you to go in and sit in his (or her) chair and they have probably dealt with much worse. please come back and keep us updated. everything will be fine.
Seeing a senior dentist is advised. A senior dentist generally would not say anything about your neglect. There is no embarassment or shame at all.