Gross subject I know I've been so good lately with my health anxiety too but now find I'm panicing again

In July I noticed some brown rectal mucus with what I thought was with a very very light pink bit in it too. I went to the doctor and she didn't seem overly concerned saying the mucus isn't always clear and not to worry, however if it happens again then to go back.

Well yesterday I think I noticed it again so have made an appointment for Friday. Of course I've googled and worried about colon cancer etc.

I had a CT scan and colonoscopy 10 months ago due to stomach pains and all was normal. I'm hoping that this will mean it's not too serious?

Do you think I have anything to worry about?