Need Advice Please!!!

My period ended on the 5th of Januaray. 
I then saw my boyfriend on the 6th. 
My cycle is around 29-30 days long. 
It's pretty regular. 
Anyways I may have came in contact with precum near my vagina on the 6th. 
Should I be worried?? 
Glow says my fertile window starts today. 
Is there a chance that I could be pregnant?
What would you do?