I had sex with my husband during my predicted ovulation time, as well as throughout the past month. My period is usually on a 30-32 day cycle. I had period-like cramps for about a week, but no period. On day 36 (yesterday), I took a HPT. Negative. Last night I began spotting very faintly (a couple of red drops that only showed up when I wiped, and today there was a little bit of pink blood when I wiped. It doesn't seem like a normal period, b/c normally my period is quite heavy the first day. I also don't have cramps anymore. Could this be implantation bleeding, and I took the test a little too early to show a positive result? Could I be pregnant?