Pregnant after tubal ? Implantation bleeding

I had my filshie clips put on the start of March 2018, I have had regular periods and used extra protection when having sex.

Last month my period was 6 days late but still seemed normal. This month I am due in about 7/8 days for my period.. yesterday had a bit of blood ( light spotting once or twice only when I wiped ) then nothing since. Im wondering if it could have been implantation bleeding.?

Has anyone else fallen pregnant near 2 years after having filshie clips on or sooner/later. * I simply just had the clips on no cutting or burning*