Implantation? Please anything helps!!

Started taking premama fertility 3 months ago to regulate my cycles for ttc. Had a cycle July & august (43 cycle length). According to the app I was suppose to get my period 10/01. Had light pink spotting days before af due. The spotting was pink not red at all, had cramping that morning & thought af was coming but it never got heavy like my regular flow. The light pink spotting lasted from 26-27th & the 28-29th brown spotting. I took a test today & it was negative. Is it still too early to test? I’m how many days should I test? Did you have a similar experience?