Blood when I wiped

Rebecca • Mummy to one angel baby 👼 Mummy to one girl 💖 born on the 11/07/2016 Lincoln Timothy John Charles 💙💙due January 28th xxx

My period isn’t due until the 18th of May but noticed a few spots of blood when I wiped what could this be had unprotected sex 29th of April 2 of May 4 and 5th of May xx