After workout spotting

I'm 8 weeks along and have been working out regularly since the beginning of my pregnancy. Starting last week I noticed after my workout, I had some pink spotting. It seemed to get better, turn to brown, and then stop. Today I had a very small clot come out after being in the gym. I assumed I'm just pushing more out through the strain of exercise, but has anyone had this experience? I have an US appointment Wednesday so I haven't called yet... any thoughts?

UPDATE: Went to the doctor today and everything is great! Only surprise was that the baby is 7 weeks instead of 8. I love my little jellybean already 😙 Nothing compares to seeing your little ones heartbeat after thinking something was terribly wrong.