Possibly NSFW: How can I convince myself to be brave enough to go to the Doctor for bleeding in the deep south?

I have had on-and-off rectal bleeding for so long. I think I’ve had it as far back as when I was 12. Maybe even 11. Maybe even younger. But I’m so embarrassed to go to the Doctor about it or to tell any of my family members I have this problem. How can I convince myself to be brave enough to just go get checked out? And what can I do to maybe stop it in the meantime while I’m scared of going?