Help :(

Going to dr for blood work tomorrow and to confirm pregnancy. My 7 hpt being positive pretty much tells me, but I need to hear it from the doc and have my hormone levels checked. So i peed tonight and when I wiped, there was a tiny bit of pink mixed with my CM. Just once when i wiped. I had a pretty good amount of Cm earlier but now I'm bone dry. AF was due yesterday or today. Any insight on the pink mixed in?? Completely nervous