Tell me about yours please

Amy
Last month I had a very early miscarriage (chemical).  This month my period is due on the 21th according to Glow. 
My question is about implantion bleeding. Last month I had the bright pink blood once when I went to the bathroom. This month I am having a very light dark brown but I also passed a clot?!? Is this my period starting 4 days early or has anyone passed a clot during implantion bleeding. Sorry if this is a stupid question 😩