The big risk is multiples, of course, but even when you do produce multiple follicles that doesn't mean a multiple pregnancy. I did 4 clomid cycles. The first time I had 3 follies, once I had 4, and the rest were 1 or 2, I think. I got a positive test once from clomid - I'm pretty sure it was they cycle with 4 follies and then a day or two later my period came. That's an unrelated issue - the doctor has no idea why my pregnancies don't stick.
Be prepared that clomid will trick your brain into thinking you are going through menopause - that is how it works to make your ovaries think you didn't ovulate and produce more eggs. So any menopause symptom is fair game, including hot flashes, mood swings, etc. If you are comfortable discussing your treatments with your mother, and if she has gone through menopause, you might want to ask her what her symptoms were as that might give you some insight into what to expect. The first 2 cycles were fine for me, I just had hot flashes and I could deal with that, but by the fourth cycle I experienced extreme depression and the doctor switched me to femara/letrozole after that, which was much easier on me. I think it needs to build up in your body before you get to that point, but please be careful if you experience any depression and make sure you discuss it with your partner. It does go away once it works its way out of your system.