With Ethan (my first pregnancy to term) my cervix was always so high I couldn't feel it, so I'm not sure if it was totally closed or a little open. My OB told me that my uterus tilts backwards a little bit & that's why I generally have trouble checking my CP. With all my M/Cs, I got brown spotting for at least 4 days before I actually started bleeding & I had really bad cramps. I wouldn't be too concerned with the CP. Your hormones are doing CRAZY things right now!
I can't wait for you to see that tiny HB! It is the most wonderful feeling in the world... right up until you hold your baby.

Make sure you KUP after your appointment!