Implantation Bleeding and Tests

Amy
Hello..
What's the general experience that people have had with inplamtation bleeding. I was due on today, came on this evening but i am crazy light, never been like this before and it is different, however i am not getting my hopes up, or fooling myself into thinking this isn't a period. It did get me thinking about inplantation bleeding though, have many experienced it? Can this effect the outcome of a test?
Thanks for any insight you gals can offer!!
😊