So I've had the worst period in my life I cramped so much I cried. And I've been extremely gassy and bloated. I've been on birthcontrol since late November and have to the the shot again in February (but I probably won't) I had some blood clots but I had more than just a few and they were fairly large. My sister said that I might have miscarried but I highly doubt I was pregnant in the first place. Any thoughts?  Also I feel a lot less cramping after a few of the clots passed.