Implantation bleeding?

Candace
Hey everyone! My partner and I been trying to conceive since the end of October. So far no help but this year been different. I missed my period in January. St least I think so because I couldn't remember having it nor can he. I'm usually irregular but after my first pregnancy in 2012 I became more regular so I was having a period each month but just at different times. I have been taking pregnancy tests for the last two weeks with no luck. Yesterday I noticed light bleeding when I wiped and I figured my period is about to start but throughout the day there was no bleeding. I only saw it when I wiped and it was really light. I'm on day 3 with it now. Is this implantation bleeding? If so when should I test?