Gill, Having similar dilema myself although i don't ovulate even without BFing so needed AC to concieve my son. I have tried 2 cycles of fertility meds (whilst still doing a very little BFing) which has induced ovuulation but still not great oestrogen levels and still BFN.Not sure if totally weaning will fix my problem or not but is a really, really heartbreaking desicion
In regards to your cycles, It IS possible to get periods without ovulating especially the first one or two on returning from BFing. With increasing regularity, however, it does seem more than likely that you are now ovulating. You can get a progesterone level done around 7 days after you think you ovulated to check. From what I gather, despite ovulation, the first few cycles may also not be that fertile until your body gets back into the swing of things but once really regular, your chances of pregnancy should not be affected greatly by BFing
The return of fertile cycles seems to be linked to frequency and duration of breast feeds so is it possible to drop a few? Spacing the feeds out should really help. Some say cutting back the night feeds is the most important but I've read elsewhere that this is not necessarily true and the main issue is to have at least 6hrs between feeds.
Wishing you all the luck with your TTC journey. I hope we both get our wish very soon