Spotting?

Could yeast infection cause on and off light pink spotting while pregnant? It started last night went pee had blood, cleared up for a couple hours had another spot in pantIliner, was all clear again until tonight it's very light. My doctors are closed Saturday and Sunday so I can't call them. I can feel baby kicking, I have a Doppler and the heartbeat is what it normally is. I have my 20 week ultrasound Monday so I was just going to wait it out till then. But if it gets heavy or dark red  I'll go to er this weekend. But yeah I'm just wondering would an yeast infection cause the light pink?