Round two of clomid questions

I'm on round two of clomid they gave me 100mg a day for 5 days since I didnt ovulate on 50mg a day for 5 days, my question is if I take it at night is that to late? And do I take both at the same time or split them one in am one in pm? my doctors dont open till 9am and the nurses are kind of mean about these questions