pink discharge

I am 6 weeks and 6 days pregnant. Well i used the bathroom and had light pink discharge when i wiped. Should i be concerned, this is my second pregnancy. My daughter i didnt find out i was pregnant until i was 15 weeks because i had a placenta previa which caused me to have periods every month. So this is new to me being this early on. Not really sure what to expect or do, my next appt is the 20th.