Struggling to conceive. What am I doing wrong?

Hi all, I'm soon to be heading into my early 40s and my husband and I are trying to conceive. We have been trying for one year now. We tried sex every other day, we had times when we did not have much sex and last month we tried sex every day throughout the whole cycle minus 2 days missed. We have both had fertility blood tests and everything came back normal. I have exercise, have a good diet. It's frustrating that Iv still not conceived. I understand from reading that your egg takes 12-24 hours to travel down the fallopian tube after ovulation. I tried ovulation tests, I'm checking my cervical fluid and waking temperature. The things I do wrong are caffine consumption & stress. I have now also starting aAeeomotherapy massage. What else can I try that has worked for you? This will be my 1st baby if I conceive. Thanks