Still have period cd 11

Hello! My wife and I are currently trying to conceive, and this past month we tried and hoped for the best. Well I got my period on 01/17 exactly when I was expecting her to show. Well today is cycle day 11 and I still have my period. It’s not heavy consistent flow, the flow stopped about 2-3 days ago but every single time I wipe there is a lot of pink discharge. This isn’t normal for me I normally have a 5 day period. Any advice as to what it could be?