Thanks for your reply AtillaTheMeerkat, much appreciated.
My LH & FSH levels were tested on day 2 and showed good ovarian reserves and were the right relationship - the gynae was happy that there was nothing there to suggest a problem.
I am having my progesterone levels checked again this month but at 3mg last time they were checked at day 21, they are on the low side.
I also had an u/s done recently which didn't flag anything except a big fat follicle. My last smear was also ok, done just a few months ago.
The gynae has suggested that as my cycles are so regular, and the fact that my lh/fsh levels are fine that I am ovulating. I do always get a positive surge on the opks and lots of the fertile stuff and cramps.
He thinks the problem is that not enough progesterone is being produced in the 2nd half of the cycle which is causing the spotting before my period is due. Not sure what has happened this month though, seems to be different again!
I wondered whether protesterone supplements would be effective but this hasn't been suggested as an option, just the clomid which I find really confusing.
I'm due back to see the gynae next week and just wanted to go with as much information as possible so I'm asking all the right questions.
OH hasn't been checked out yet but we'll go down that route once I have some answers.
Thanks again for taking the time to reply.