Hi Downton - don't worry - I lurked here for a while myself before becoming pregnant. You are right - the support here is just amazing - and I think most of my pregnancy/baby knowledge has come from this thread!
I really sympathise with you regarding trying to conceive. I started TTC last year aged 40, had an early MC at the end of the year, then started trying again. At 6 month point, we had tests as a precursor for referral to fertility clinic, but same month I left my job and same day DP and I skipped off to a tropical island and, erm, conceived a baby. I was ever so shocked as had really given up by that point.
So, the short answer to your question is - conceived first time after a couple of months, then second time after 6 months. I guess the only other thing worth mentioning is that we did take a tube of Conceive Plus on holiday with us - no idea if that did the trick, but doesn't seem to have done any harm...
I definitely don't think you are past it - us ladies here stand as testament to that! However, egg quality is an issue as you get older. I have heard good things about Chinese medicine - apparently has a higher success rate than ivf in older women. I don't have any personal experience of it, but it worked for a 40 year old friend who had been TTC for 5 years and I just read an article on it recently.
There is also a 40+ conception thread on here somewhere which has helped a lot of women (some of the other posters here will probably be able to give you a link).
Good luck and hope to see you on this thread with good news soon 