Do I need to be worried?

I don't know a lot about the human body yet, but trying to learn so please help me 🙏
When I wiped just then there was a bit of light red blood. According to the app I should be just after my fertile window and a little more than one week away from my period (it's quite accurate usually). Is this spotting? I've been trying to check my discharge and I realised that sometimes I get pinkish blood when I wipe. Is this normal? And sometimes i think it does smell a little fishy? (but I dunno if that's just me being worried) 
Thank you 🤗

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