make sure you also check your partner.... I have been trying with mine for 7 months and knew something was just not right, since I have two kids from a previous marriage. Sure enough he has some issues with the semen analysis....
50% of the cause of infertility is caused by your partner.
Buy an ovulation predictor kit....also look for the body signs that usually appear during ovulation...there will be slight increase in BBT, also your cervical mucus will become more slippary and increase in quantity....some even get ovulation cramps..
You may want to go and buy some ovulation test. I buy my test from the Dollar Tree $1 and they work . Hope this helps.