Help please..

Hi ladies, I was 5 days late and today looks like I have started my period however it has been very painful and heavy. Sorry if tmi but I have seen a very large mass of blood and tissue possibly a clot but I've never seen one like that before. About size of £2 coin. As I'm new to ttc I don't know if this means anything or not. Thanks for taking the time to read this and baby dust to you all J xxx