Go, you must. The injection techniques now are amazing, you barely feel anything. And I am the biggest dentist refuser ever.
I ended up at the dental hospital having a big molar removed, I'd left it and left it, it snapped at the gum line and couldn't be removed at the surgery as had a crooked root. They were so lovely I didn't even have the sedation, though I was offered it and I had always thought I'd take it.
You'll feel like the heavyweight champion of the world if you go, I was so proud of myself once I'd made that first step.