my partner and I have been trying for a baby for 7 months now I was meant to start my period the 29th of November but I got my period the 27th of November 2 days earlier, I then finished on the 30th of November, my partner and I then had unprotected sex that night and the next morning (December 1st)

today I was at work and this morning I went to the toilet and noticed little blood on my undies and a little when I wiped, only happened that once and haven't had anything since, what could that mean?