less than a week to go

I have less than a week before i have my next appointment to see if the clomid worked and to see if they are going to give me some more, but the only thing is if they do give me more clomid i have to take them day 2 of my cycle but i have a feeling AF is on her way, it is highly unlikely that i am pregnant this month as it was unmedicated so i am waiting for AF just not quite yet the soonest she should come is on Wednesday that way at my appointment if they give me the prescription then i can take them from that day but if it comes any sooner then i have to wait another month now that would irritate me. here hoping i am just thinking that AF is coming when its not.