It's definitely a good idea to go to your doctor and get the basic checks done - your hubby will need to get his sperm tested to see if he's got enough good ones (you can't tell till you test!). You'll also want to get blood tests to make sure you are ovulating. With a longer cycle it's possible that you have pcos - I'm pcos, but still have 5-6 week cycles. It's always good to get checked so if anything does turn up you can look into getting treatments sooner rather than later. I found I'd get random temperatures on cycles when I wouldn't ovulate, and on cycles when I do ovulate I get a nice temp rise. With a 35 day cycle you'd expect to ovulate around day 21 (depending on your luteal phase - might be a few days earlier or later).

We started trying for #1 when I was 26 (hubby was 25), and found not only did I have pcos, but hubby had low sperm count. We did end up with a natural conception when I was 28 though, so things can sometimes happen.