Hi Karen
I succumbed and got a Maybe Baby microscope in our third month TTC. I was a bit sceptical to start with but it really did work. I used it in conjunction with temping and it just really helps to pinpoint your O day and unlike temping, you get a 'warning' as to when the big day is on the way. I only used it for like 5 days and bingo - a HPT! Have now lent it to another friend who is TTC too, so hopefully she will have the same luck. Let's hope it pays off for you and you have a BFP next month also!
Good luck!