HCG trigger shot should be gone by now and if your pregnant it should show up. I had IVF on 4/11 and a two HCG shots on the 16th and 18th, and I have already tested positive (MY own HCG not from the shot). I am surprised your fertility specialist didn't give you this information. I am not sure when your period is due. If you are on progesterone it won't likely start until you stop taking it.