Movement

I am currently 36 weeks pregnant with my third baby. The past two weeks I have been feeling like labor is coming soon. This morning I woke up and had lost some of my mucus plug. I also realized that I haven't felt my baby move as much as I usually do. I'm laying down now and I do feel slight movement however, the movement is very low in my pelvis and it's not as strong as I would usually feel it. Could my baby have dropped? I'm just wondering if I should contact my doctor about the change in movement even though I do feel slight movement.