I took clomid for two months last year when I fell pregnant. I had 50mg on CD 2-7. I had hot flushes at night, but could've been the warm summer we had and in the day I would get dizzy at times. So my advice is to drink lots of water, take it easy and get ready to chart because on clomid your charts are so visible for ovulation.
If you don't usually ovulate, this one (depending on strength) may make your ovulation symptoms quite heightened. I had sore nipples, ovulation pain and sore back which I never had.