Ok, so my last period started on Jan. 11th, so I'm assuming I was ovulating around the 24th or 25th, and I had unprotected sex (I'm trying to get pregant) on the 24th, 25th, and 26th. Now, today, which is the 28th, I've had some light cramping and light bleeding. The bleeding started around 5 or 6 this evening and now it's about 8 and it's very, very light. I've been reading up on implantation bleeding for the past 2 hours or so and all I seem to read is that it can occur 10 to 14 days after ovulation. Is it possible that my spotting, only three to four days after ovulation, could be implantation bleeding? My period isn't due for another 11 days, and I have a VERY regular cycle. Here's hoping. Thanks : )

Please read this about implantation bleeding.

Typically what women believe is implantation bleeding is actually ovulation bleeding. We tend to spot when the egg is ovulated rather than implanted. It is possible that you are pregnant and that you were about to start a period and the hCG hormone did not allow a full period, but stopped it to provide enough enodmetrium for the egg to implant.

You do not mention your age, which could be a huge factor in this. Although you may be VERY regular all of us women experience an unusual period at one time or another.

Try taking a HPT using first morning urine. If that comes back negative then you should make an appointment for a blood test.