Of course pregnancy is a possibility and only time will tell. A test can be reliable as early as 10 days after conception or a few days after the missed period.
You can pass clots at any time in your cycle. This is the result of blood which is older. The natural process is for pooled blood to become clotted. Your body then gets rid of it and this is considered normal in most cases. Because of this, you can't count on this as a symptom of pregnancy.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN