Bleeding

I am 6 weeks today and I just started spotting. It’s a red-dark reddish color. Obviously I’m thinking the worse right now. We are out of town until tonight. I haven’t had an ultrasound yet just blood work. Should I call my doctor tomorrow about this? I’m pregnant after an <a href="https://glowing.com/glow-fertility-program">iui</a> and after trying for years.