bleeding

so i had my AF just over a week ago as normal however yesterday morning i woke up wet with blood everywhere as the day went on it basically stopped by bedtime so had a pad on however this morning i got out of bed and just bled everywhere in my knickers (leaked in front of pad) and its a really bright red and very watery compared to normal period blood i say watery because i put a heavy flow tampon in before i went out to do a bit of shopping about 2 hours in i went to the toilet and i had leaked everywhere but i wernt aware until that point (normally i know if im leaking sometimes think im leaking when i not) ....confused why im getting this bleeding and also why so heavy opinioms ?