2 day period and??

Seydy
Hi everyone ok so we are ttc and this month AF is usually 4-5 but she came 2 days early and was heavy day 1 and second day just light spotting. Today is the 3rd day and have been feeling pulling sensation, no cramps on the left overy and I have is brownish discharge and some pink spotting. Did a test today and got a bfn. Help is this implantation?