Full period or implantation bleedinf

Hello!

I was on a few months of the pull out method and it wasn’t worth the fear so i got birth control and planned to start it when my period started as per doc

My period comes around 4th, 5th and this time it came on the 7th

It’s a bit lighter and usally and I’m not filling a pad just more when I wipe as you seen in pics sorry tmi

I started my birth control last night which was my first day and wonder if that has anything to do with it being late ?

Can I still be pregnant?? Some guidance will help.