Tint of pink when wiping after using the bathroom

Hello ladies... looking for someone to relate or has advice. This morning when I woke up I went to the bathroom (just pee) and when I wiped I noticed there was a very very small tint of pink. The urine looked normal... should I be concerned about this? My doctors is closed on Fridays so I don't know if I should go to urgent care or the ER or if it's even that serious. I am currently 21 weeks. THank you in advance for any kind of help!