Trying to conceive past 6 months.

Dani
I'm 40, almost 41 and have been trying to conceive for past 6 moths. Counting days when ovulating and making sure we have sex on these days and more. Am I getting too stressed and should I perhaps go and see a doctor considering my age. I'm slim, healthy, don't smoke. Drink but not massive amounts.... am I freaking out that I will never get pregnant or is this normal?