I haven't caught up yet but am dismayed that you feel you have tried everything, Nomio. This may have been a long, long four years for you, but you have not yet seriously considered the wonderful world of IVF. Yes, the success rates are not amazing -25% chance of success with the NHS. However, there is a big world of assisted conception out there, including world-class embryologists (Czech) and superb success rates. Look at me: 42 with a mmc behind me; success first time. Yes, the egg was from a 24 year-old donor, but I got my amazing baby in a way that I would have poo-poohed when I was not quite so desperate (or old).
Look at Lucie - she is going to the Czech, too, and using her own eggs. She will have success, I just know it. The clinics over there are second to none (and I don't believe Serum at Athens is superior to the Czech clinics, either, but Penny at Serum is a genius in her own right).
Please, Nomio (and anyone else whose thoughts about IVF are frightening or defeatist), try to see beyond the limits of your efforts so far. You have fought valliantly for your baby and there is no way I am letting you write this off. You haven't 'tried everything' - not by a long shot. Your body has never been supplied with the perfect dose of drugs tailored specifically for your body; your eggs have never been harvested and watched under time-laps video; they've never been assisted to hatch or covered with an embryo glue to aid implantation. Your husband's sperm has never been micro-analysed and the very very best of them injected (if necessary) into each egg.
I would never denegrate our brilliant NHS, despite the not-very-great success rates here in the UK - and if you qualify for three free rounds of IVF then that is super - but for £5k you can seek the best conception rates abroad and throw absolutely everything at your cycle knowing that you are doing all that is humanly possible to reach your baby. Moreover, you have a nice little holiday where you can just be together, focusing on your mission.
Please, please...allow yourself to dream of a team of experts bringing your baby to you. Four years is a horribly long time to have only got to the Clomid stage (by-the-way, were you told to start the drug on CD1, Nomio? I have never seen that before).