Blood clots near baby

Kristin
Has anyone else experienced blood clots in their uterus while pregnant? I'm 11 weeks 1 day and I've had a blood clot the entire time. It started out as two clots, one dissolved and one grew a little since last time (6 weeks). The doctor won't let me announce my pregnancy socially, just in case anything happens. I'm absolutely terrified. 
Has anyone else experienced this and had a successful pregnancy? Any advice on what to do? 
Thank you!