brown discharge 14 weeks anyone?

Sarah
I had red spotting Saturday morning for about half an hour and ever since have had a dark brown bleeding, it doesn't come onto a pad of but it's quite a lot when I wipe, I had my scan on Tuesday and everything was good, I went to A&E yesterday and they found babies heartbeat straight away, they have booked me for a scan on Wednesday morning. The bleeding seems to subside by the evening but is back by morning has anyone else experienced this?