Blood clots 1 day after BFP

Danielle • Married my best friend on 4/11/2015. I have a son—rainbow baby born 2016, and trying to grow our little family💗💗💗
I had taken 4 pregnancy tests yesterday and all positive, I just couldn't believe it! But today I started having some light spotting, and now it has progressed to heavy bright red bleeding with lots of long blood clots. I'm afraid I've miscarried now. Am I in danger enduring this heavy bleeding and blood clots  and need to seek medical help or will rest be ok? I'm so beyond sad 😿