Are we doing something wrong?

I know it can take 6 months to a year for a healthy couple to conceive, but my husband and I have been trying off and off the last 5 months or so and even when we seem to do it the “right” days, it still doesn’t happen. I am going to attach my charts where I took temps and OPKs, and I want suggestions on days we should be doing it or if we have been hitting all the right days. I am currently on our 6th month trying and am in my tww. Haven’t been the best at taking my temp but my temps have confirmed ovulation and I am praying this month is finally our month. Thank you! Also, we have been pregnant two other times with one living child. We also have been using preseed during my fertile week.