It really really depends on where you live, but also on how far you can get referred by doctors. My GP referred me to the hospital for PCOS related fertility treatment. They faffed about a bit, gave me some clomid, which made me ovulate the first time, but not the second. Then that doctor told me she didn't know why that happened and she then referred me to an even more specialised doctor who has now given me clomid and metformin (a miracle cure to help women with PCOS lose weight) and will be doing follicular tracking so they can actually see what is happening. Keep trying and don't let them persuade you to "keep trying" the same thing if it doesnt work the first couple of times, ask for a different approach. You only get so many months (supposedly 6) of clomid.
Oh and you can expect some PMS type symptoms whilst taking Clomid. I think it varies a lot between different people, but I swing wildly from a snappy grumpy whingebag through ridiculously happy to downright melancholy. All usual effects though. Oh and your mucus might change too.