Implantation?

Hannah • 25, Christian. Married to my best friend. Baby girl due May '18 :)
Hi I'm cd 20, ovulated cd 13 and last three days I've had super light spotting. The first day (about 5/6 dpo) I had it was creamy brown, the second day it was brown/pinkish and had more after sex and today eggwhite yellow cm. I've had light cramping and a pulling feeling. What are y'all's opinions?