Your mood swings are probably being caused by Clomid. I had to stop taking it because of them. It didn't result in a pregnancy nor any change to my cycle so I don't think it was working for me anyway. Clomid can work miracles in some women but in others it does nothing, but unfortunately for most doctors it's the first thing they throw at you without investigating other things first. Multiples do happen - there's a show on Foxtel about Quins that were born solely because of Clomid but I think they are pretty rare (apart from twins).

One thing I've learnt is that after being on any kind of birth control some women can take a long time to get back to normal. I'd suggest temping is the best way to conceive regardless of anything else you try. Best of luck.