Bozo
I'm sorry that its been such a trail for you- but the most impt thing is NEVER give up and try to be proactive. First of all has hubbie had a sperm analysis - even if its ok, buy some zinc tablets and get him to take one a day.
In your case, even though you know when you're ovulating, ever considered going to the gyne to check that the egg is of opitmal size?All it takes is a transvaginal U/S 1-2 days before ovulation. If the eggs the right size, maybe your doc can give you a trigger shot so that you and hubbie can make sure you're together on time.
Also if that month doesn't turn out right and AF comes, remember to chart down the day you ovulated and the day that AF came and thats your Luteal phase. It should be more than 11 days at least for implantation to happen. If its short- talk to your gyne about having progesterone shots or alternatively start taking Vit B6 at least 50mg -100mg from the first day of your period, you'll see an improvement after 2 months.
Another thing is that sometimes the egg and the spermie is fine, but the CM is too thick or acidic, in which case you can try pre-seed (need to get it from abroad), or increase your CM flow by taking Robitussin cough medicine (ONLY get the brand that states clearly Guanifesin??) on the front, NOT the one that has antihistamine cos that dries up your CM even more- its available in Watsons (ask the pharmacist if in doubt). I also use to take Evening primrose oil capsules from the first day of AF then stopped once ovulation occurs(don't take anything after ovulation apart from the Vit B6 and folic acid).
After 3 months of no show- I decided to all the above and after 2 months I'm now pregnant with my fourth, so take heart- your turn will definatley come.
On a seperate note, remember not to drink or eat Soy products and tofu and also don't drink or eat cold foods as its bad for the uterus.
And also, if you can afford it- go to Troy sing for his herbs and acupuncture, as I know he definately helped me alot.
Sorry this is so long-winded....