What type of CM is normal when pregnant?

Mrs. T
I'm 6w3d and I went to the bathroom earlier and had clear, thick cm with just the smallest hint of pinkish brown. Didn't even really look like blood at all, wouldn't wven say that it was. Anything I should be concerned with or is this perfectly normal? I'm leaning towards the normal side, would just like reassurance. Going tomorrow for an ultrasound to hopefully hear the heartbeat! 😊