Bleeding and clotting?

I have been feeling sick and just plain tired for the last week so I decided to finally take a pregnancy test today which came back positive (3weeks, 6 days) - this will be baby #5. About 8 days ago however I had a sharp pain in my groin and had very heavy clotty bleeding right after, I have spotted on and off since. I'm wondering if anyone has had similar symptoms and what the results were. Any insight would be helpful! Thanks in advance.