8dpo spotting. Tmi alert

Yesterday and today ive had on and off cramping. Today i started spotting brown and there is absolutely nothing when i wipe. Can this be implanatation bleeding?! How soon should i test if the spotting stops?? Literally kinda felt like i was getting AF 6 days early today and theres nothing when i wipe! cramping is gone now too. Ive been super moody too the last few days.