Trigger shots

Just saw a fertility specialist and after 2 years and 2 losses, she wants me to do the trigger shot ovulation and then progesterone. I’m supposed to call her and also get an ultrasound on day 3 of my period but I’ve been spotting for a couple days and today was super heavy. Do I need to count the days that I had red when I wiped or just today where I had very heavy? OR should I do an unmedicated cycle this month (not done I medicated for several months) and start trigger next month??? Any advise on trigger??