35 weeks pregnant, lost mucus plug this morning, having cramps.?

I am 35 weeks pregnant. On Halloween night I was in the hospital having contractions 3-6 minutes apart. The nurse sent me home and the contractions stopped the next afternoon. Now this morning I went to the bathroom and I think I lost my mucus plug. It was about the size of a nickle and it was a glob of clear goop like. Now I am having cramps again which are like menstrual cramps. Could I possibly be going into labor? I have a doctor appointment today at 3:00. What do you think?