Implantation?

Erin

Hey ladies.

I believe I’m now most likely 8-10DPO (?) Ive been having cramping, mood swings, nausea, and my boobs are so sore. But not like when AF comes around. The last 2 days I’ve had very watery, barely there light brown/sometimes pinkish discharge. Could this be implantation? When should I test?