Over 35 TTC #1

Anyone over 35 TTC #1? I've been to the doctors and had some basic health tests. She said all was ok. DH and I work long days and our energy levels during the week are fairly low, more me than him. We're going into month 6 of trying. Every month the same so far, he's convinced we're pregnant and me always convinced I'm not although desperately wishing I was. Anyone else in a similar situation? Did you keep going or at what stage did you seek additional info from a GP because it was just not happening. As the doc said before Xmas there's no reason why I shouldn't conceive. AF is as regular as clock work :(