Mucus in diaper

Pc
I have a Drs appt to check out why my baby is having frequent vowel movements with mucus in it , for the last 5 days  no blood no fever.
 I know some is normal with teething because of this we delayed solids but still feeding only rice cereal 2 times a day. What have you experienced ? Should I be worried ? My Drs appt is in 4 days