Hiya, this is the first time ive posted, hence the lack of piccie etc. I wanted to try and put your mind at rest. I had the same. I had a sharp pain Wed evening and went to my GP, I had an emergency scan that afternoon and everything was fine. It's normal to have brownish/pink discharge as everything is moving about. I KNOW it's easier said than done but try not to worry. The scan will put you at ease. What you are experiencing it normal.
Good luck.....x