Can you get super dark Areola’s/nipples and not be pregnant?

My period isn’t due for 2 more days (October 29th).

Other symptoms I have had are nausea, food aversions, cravings, increased milky cervical mucus, high cervix.

On the 22nd through the 25th I had implantation like cramps in my lower back very light and right/left pelvic pain and a spot of pink blood once.

My nipples/arolea’s are normally lighter.

I have taken tests on the 24th,25th and today and they were negative