3 wks ago (just 2 days after my period ended) I had started bleeding very lightly after sex...intercourse was vigourous but not at all uncomfortable or painful. The bleeding has been very light but of a very dark reddish brown colour, and some bloody mucus like clots- I am not sure what is going on, but its been quite a while now and I am getting concerned...can someone explain if this is normal or what I should be asking a dr to check for?