My husband and I have been trying to conceive for 4-5 months now. I usually have an extremely regular period starting with a light period followed by 3-4 normal flows but this month, I had 3 extremely light days (I didn't have to use anything, not even a liner) followed by a couple light days and that was it. I have experienced some breast tenderness but nothing extreme and now I have slight nausea. Also, I took a hpt that was negative on day 3 of my light period...could I be pregnant?