First time using OPKs - I started using ClearBlue Advance Ovulation Tests

on CD 6 which happened to be the day after my period ended.

Got a “Low” reading, then the next morning and every morning since I’ve gotten a “High” reading.

My cycles are usually 28-30 days long, but I started testing early anyway.

Is it normally to get a “High” reading immediately after your period? Or could I be pregnant and what I thought was my period actually be implantation bleeding?