Hello, my husband and I are trying to conceive. I have a pretty regular cycle 28-29 days. Took Ovulation Predictor tests from day 11- day 16. Tested positive on day 15. Had sex on days 11, 12, 14, 15, 16.....Then I had light (pinkish) spotting on day18. Also light spotting ( a few hours) on day 11. Very confusing....I am 39 and this will be our second child if successful. Can you help me out with why I am suddenly spotting? I am of average weight, very healthy and had a good annual OB/GYN check up 6 months ago. We just started trying last month ( August). Thanks in advance!