Implantation bleeding ??

Tiana

Hey ladies....can you guys give me your experiences with implantation bleeding? I do have an IUD and I’ll be calling my dr today to make an appt but just wanted to see what you all have experienced. My cycle can range between 34-39 days, my calendar says expected period is the 13th. Monday (8th) i had light pink spotting, which is common the day before my cycle starts. Yesterday it was brown and a little more. I figured my period was starting so i put on a liner, however, it slowed back down again didn’t feel the panty liner at all and went back to just brown spotting/discharge when I wipe.... I’m not sure if this would be implantation bleeding or maybe still a start up to my cycle so I’m super confused.