Spotting at 17 weeks?

I'm 17 weeks 2 days... and this morning I went to pee. When I wiped there was bright red blood.. I went back 30 min later and there was none. I actually have a doppler rented from bellybeats.com so I got to hear the heartbeat... and checked it an hour later and it's just a beating away. Has anyone had this happen to them? Was everything ok? Thanks!