We tried for 48 cycles (4 years), and had every smug bugger around us sneezing and getting pregnant with us getting more despondent. Test after test kept saying there was nothing wrong (afterwards discovered I have severely underactive thyroid and didn't ovulate properly).
During that time I nursed my lovely mum through end-stage cancer and I wanted so badly to tell her I was pregnant but it never happened. My FIL also died during that time, which meant by then we had lost all 4 parents so no wonder it didn't happen really.
We tried everything- all the "helpful" suggestions from friends now into their second - or even third- pregnancies. " have you tried relaxing? My third cousin once removed did this and it helped." Relaxing, you say? Why didn't I think of that?!?
In the end a wonderful lady on the infertility boards here posted me her spare clomid- and I thought this would solve it. So I took the 3 months worth she sent and... nothing. Bought 3 more months worth from a very dodgy website, still nothing.
So we gave up. Not "relaxed", not "had a holiday". Literally crying, snotty, angry mess gave up. Went to a gig in London, spent the whole weekend taking drugs, getting pissed, generally raging against the world. Furious and defeated.
A few days later my very romantic DH said "give us a go on those!" and tried to touch my boobs- they were insanely sore as they always are before AF arrives. Thought no more if it, and headed out for the day. Can't put my finger on why I had the urge to do a test, especially why I decided to do it in the toilet of the supermarket I'd bought it in but I did a clear blue digital and when that little flashing PREGNANT came up I sat in there for a good 10 minutes. I thought it was a mistake so i went straight back out there and bought a litre of orange juice to make me wee and another test.
When that one said PREGNANT as well I drove home in shock, startled DH who wasn't expecting me home for hours, thrust them both into his hands and watched as this big man dissolved into tears. The next few hours are a blur, although I had to Google whether I was allowed a cup of tea (!) and we sat and cried and hugged.
We were booked to go to Berlin on a bender a few days after I found out, so although we went, I stuck to alcohol free lager ( the novelty helped it taste a lot better!). It was a magical time, wandering around this crazy city with our very own little secret!
My beautiful DS is 2 now and snoring next to me as I write... and yesterday I got a BFP with our second little bean after the very first month of trying ( after I had little one they diagnosed me with thyroid problems and sorted out my medication, meaning I now ovulate!)
It seems as though you'll never get there and it's such a lonely place BUT keep going OP- it's the only way it'll happen! Good luck!