Confused! πŸ˜“πŸ˜“πŸ˜“πŸ˜“

Hey, any help much appreciated! 
Started period on 12th July, ended on the 14th (normal for me) not used contraception - but last night started with a bit of blood.. That would make my period 12 days early, which isn't like me at all?!
Any ideas what it could be please?? πŸ˜₯πŸ˜₯πŸ˜₯

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