My bf and I are ttc, we just started. I used ovulation kits, I counted days, had sec during my fertile period. My breast has been very sore for the past few days. Which isn't normal for me. I started spotting today and my AF isn't expected to come for another 3-4 days. Could this be implantation bleeding? It's not enough for a regular pad but too much for a panty liner. Should I still take a test?