Cervical Mucus Question

Random Question, Can you have EWCM more than one day? like the whole fertile window? Because i had i for a while and even though my SO and i always have protected sex we still try to do it after ive ovulated to kind of lessen the chances even more. We did it on the 15th day of my cycle which Glow said was the last day of my fertile window but it was protected and i was still having the fertile mucus. im about 7 days from my predicted period now plus or minus a few days since Glow is just a prediction. just wondered if thats weird, normal or what. thanks!