Abundant watery and EW cervical mucus AFTER ovulation?

This is my second month temping, checking cp, and using opk's. I got dark pos opk on CD16, along with EWCM and ov pains. I o'd on CD 17, temps went up on CD18. Im currently 5dpo and have had a temp dip below my coverline today. I have never had a dip like this before, while charting. My cm usually dries up after ovulation and what is there is creamy. Today along with the temp dip, I have this twinge ache in my uterus area and ABUNDANT cm which ranges from watery to EW. I have never experienced the abundance of CM after ovulation or the temp dip below coverline. Have any of you experienced this? Could it be implantation? Thanks!