Spotting and ttc

Taylor

I’m due to start my period on the 12th. We did the deed during the last two days of my last period and then if not everyday every other day since my last period. I’ve been spotting lightly going on my 3rd day today. Could it be implantation? Took a test 2 days ago came back negative. When’s a good time to test? My daughter just turned 10 months would love to be pregnant before her first bday!