Hi Sarah,
I was in the same boat as you, i was attending an NHS hospital and they put me on Clomid for a year too and every 3 months they would see me & when i wasn't getting pregnant they would increase the dosage to see if that would work. They never done any blood tests during this time and it was only towards the end (when my consultant left and a new one came along) that i was sent for a day 2 blood test which revealed that i wasn't ovulating, so a whole year taking clomid for nothing! Then they told me that the clomid wasn't going to work and i would have to look elsewhere for treatment as they don't do IUI/IVF in my area.
When i moved to a private clinic & had my initial conultation the consultant was amazed at the length of time i had been on clomid for and the fact that i had never had any blood tests during this time. I was really annoyed but my consultant said that this type of thing isn't uncommon for NHS hospitals

.
I had some IUI (intra-uterine insemination ) done after that - this is where you are given injections to control your ovulation and then they insert sperm at the best time for fertilisation (there is a separate thread on the messages board for IUI people). have a look there and you should get some more information on what's involved.
good luck!
Lou.