wondering..

hey ladies...

when I got pregnant the first time I never experienced implantation bleeding and am wondering what it looks like?

my period is "due" in about 4 days and I have had some dark to light blood today, not enough to fill a liner or anything like that, but more than just "spotting". I've got light cramps and back pain as well as nausea.

please let me know what you all think and feel free to share experiences, I don't really trust Google all the time since everyone is different. thank you