Light period after provera and starting clomid

Lindsay • 29 years old from ma- married with a 3 year old son and ttc now!
I got my period mon night and it has been 2 nights and it seems to be gone- it was red blood so was def my period but I am supposed to start clomid on day 5 of bleeding but since I'm not bleeding anymore does anyone suggest starting clomid day 3 or 4 instead of 5? Also what side effects did clomid give u?