When you have your period = Day 1
Best chance of getting pregnant = Day 14 - 25
Try more attempts during the said period. Allow semen to be
inside body for a longer time (i.e. don't shower after doing).
If you're desperate for a Dragon baby, visit a gynae to find out
what's the actual problem. You still have 1 month left before it's
too late. 
Best of luck to you, Cheers