Need Clomid advice!

Gee

I was prescribed Clomid to take during cycle days 3-7. My day 3 is tomorrow and I planned on taking the first pill in the morning, however I'm really concerned that I'll be affected negatively by the side effects, so I'd like to take the advice of some ladies who have suggested taking it at night. So, my question is should I take it tonight, or tomorrow (day 3) night? Please be nice, I know I'm supposed to follow the prescription...