my husband and i are trying to have a baby. i went to see the obgyn cause its been a long time and still no babies... he wants me to do three months of ovulation tests to establish if im ovulating. i had my last period on august 24th and it ended on the 27th...well anyways yesterday i was ovulating according to the test...but today im not...i thought it was suppose to be like 48 hours or something?