BFP on first round of clomid ?

Anna
How likely is it to get a BFP on your first round of clomid . This is my first round I'm on my 4th pill and day 6of my cycle . I have PCOS so the ovulation sticks don't really work but I'm still peeing on them :) and we are planning on BDing every other day starting today . 
Ps I have long cycles anywhere from 50-70 days