i can totally speak from experience. I was on clomid for 5 cycles. As long as your doctor is monitoring you well, (checking your progesterone on day 21, and upping your doseage if you don't ovulate) then it should be fine. My dr. wasn't very good. He left me on 50 the whole 5 cycles, and i only O'd 3 out of the 5 times I was on it.
Just because you are taking clomid does not mean you will ovulate, so be sure to have a day 21 blood test taken. I really hope this does the trick for you hun! There is nothing worst than just waiting around for SOMETHING to happen. Maybe this will give you that needed "boost".
Let me know how it goes!!
As far as s/e goes... be prepared for hot flashes, and moodiness. You also get a LOT of pg symptoms when you are on it, so it's easy to get your hopes up