I'm sorry :( it's a really rough journey (which nobody made clear in high school, when we were all led to believe we would get pregnant just looking at a boy....).
It took us a long time to conceive too, and we'd also started down the nhs treatment route. The thing, which often didn't really help, but sometimes lessened the blow, was that I wrote a list of "treats" for myself, and each time my period came I got to have the next treat on the list. Nothing massive, but things that were enough out of the ordinary that I didn't usually do them. Such as dinner at a really nice restaurant, buying myself a stack of good magazines and a bar of chocolate and hunkering down for a couple of evenings, weekend day trip to a nearby beautiful town for sightseeing and window shopping....
Granted these things weren't really a substitute at all for what I actually wanted, but in some way it helped me when I was really low to be able to think "well, I'm not pregnant, but if I was then I wouldn't be eating at this restaurant tonight, so that's a small comfort".
Obviously I could have been both pregnant AND eating at the fancy restaurant, but psychologically, telling myself that this was JUST because I wasn't pregnant gave me a little tiny positive in all the misery.
Keep going. It is really really tough, but try to keep your spirits up. Wishing you all the best :)