HCG trigger! I need advice!

So went to my doc this morning. Did 3-7 150mg of clomid and this morning (CD13) I have one size 20 follicle. 
​He gave me a trigger shot (I may now be bankrupt) even though I've been having PMS symptoms and dull achy cramping since last night (sign of ovulation). 
​Bf is off island until tomorrow night - doc seems to think the egg will wait around for him! I'm nervous we will miss it and I'll have gone through all of this for no reason. 
​Anyway - how long after HCG does the follicle normally pop? I'm still having cramps! Dull achy ones. 
​He gave me suppositories to start using twice a day CD16, baby aspirin once a day and said to BD starting tomorrow (when bf back) and for the next 2 days. 
​Ladies, I'm nervous as £&%#!!!!
​Can anyone offer any advice? Please!?