Confused about bleeding

Hi. I saw the GP after sometimes getting a spot of blood on the paper when I wipe myself after sex. She said my cervix looked clear and took swabs which came back clear.

I got a letter for a coloscopy in a month or so then got a letter for 1 sooner (15 days)

Really worried about whether this referral is urgent.

My GP did not ask how heavy the blood was (I read of bleeding for ages not just a spot like I have)

Thanks