I have a regular 25 day cycle and started my LMP on 01/01/05. We had on 08/01(day 7) and I'm pretty sure I ovulated on 10/01(day 9). Have felt nauseous for the past few days but when I did a First Response test today (day 19) it was negative. Am I mad to think I'm pregnant and am I right to think it was too early to take the test?