Trigger shot

is it pretty much a given the trigger shot will work? I am really worried that it didn't. I felt a lot of pinching in my ovaries today and it has been 4days since the trigger and two days since my iui. I have had some egg white cervical mucus all week and still having it. I had the most yesterday. I have heard iui's can cause mucus to come out with the cervix having had been poked and opened and all so not sure if it's from that and what my pinching feeling is! I usually ovulate around this time so worried that my body IS ovulating now. The doctor was confident that.I ovulated either Tuesday or Wednesday when they did my iui's but worrying myself away here.. help!