Mucus Plug

I lost my mucus plug this morning at 3:30 AM. I have had some small contractions today but nothing measurable. My lower back has been hurting most of the day and I have had some minor cramping. A search on google indicated that when the mucus plug comes out, it is a sign of the cervix softening. Dilation is likely around the corner, but could take weeks to progress to labor. However there was a warning that if your mucus plug comes out prior to 35 weeks, you should see a doctor to be safe. I have been trying to contact my doctors office all day, the line is busy. I will schedule an appointment to be safe.