Repost for Dr. Q

Ok, so nurse called and said they expect af to show 4/28 and that retreival is set for 6/15 (Father's Day)..so the thing is..I know af won't come until 5/1 b/c I'm on no meds this cycle which tends to make things a few days longer. So, how does that work, will my retreival get pushed back or will I take more meds to keep it on time??

Thanks so much!