Pink Spotting in 3rd Trimester (TMI/Picture Included)

Br
I'm 34 weeks and a day, and today (the last 4-5 times I've gone to the bathroom) I started having pink discharge every time I wipe. On two occasions I also noticed some pink mucus at the bottom of the toilet bowl. 
I haven't had sex in 4 days, so I'm pretty certain that is not the cause. 
I've read that spotting can be a sign of early labor... I have not had any contractions (at least that I've noticed).
I called the midwife the first time I saw the spotting and she said to keep an eye on it and to come in or go to the hospital if contractions start. This being my first pregnancy, and being a six week preemie myself... I'm a bit concerned. 
Has anyone else experienced this? What was the outcome?