Last month while one birth control my period was very dark. I looked it up and found out it could just be old blood so I isn't worry about it, but it lasted the entire period length. I stopped my birth control about a week ago and two days earlier than my period would have been on my birth control I thought I started my period. But it's dark again and darker than last month and full of clots. The clots are small AND large in size ans very abondant. It hasn't gone down or brightened in color at all. I'm worried something is wrong...

When you get off birth control your period tends to get heavier, at least that's how mine have always been. So that is probably why it is so dark and clumpy, because its so concentrated.