90% of woman who desperately want to get pregnant don't until they stop trying so relax and focus on other things and watch when you stop thinking about it you will get pregnant good luck!!
I know this sounds weird but if you stop trying to get pregnant you will more than likely end up conceiving. It usually works for alot of people
Try adding maca to your diet, pill or powder. It increases fertility.
Try not having sex every day and tracking your ovulation, not just relying on the calendar, using something like the test strips etc. Then when you should ovulate, sex the day or two before, day of should be good.
Good luck
I've got pregnant using preseed. It only took a month. Give it a try. I'm now 6 weeks pregnant.