What Are The Chances Of Pregnancy Having Ruptured The Eggs With Injection?

hi...im trying to concieve...im on my 18th day today...2 eggs in the uterus acs to abdominal sonog of 23 n 18mm n 8.5 thickness approx...my periods started 24th of this month uptil 29th(haVE A 29-30 DAY CYCLE)
BUT THE DOC SAYS since the egg hasnt ruptured on day 18th...it will be diffi to rupture naturally n i shud be given injection 19th or 20th day...though its a little late....my husband n i have had an intercourse on our 16th n 17th day....910th n 11th july)..

What do u recommend doc?