Trigger shot

I’m 11 days post trigger shot today. I’ve been testing out the shot this time around and I swear the test was negative on day 9 and 10. Today there is a faint line on two different brands of pregnancy tests. I guess my question is that could it still be possibly be the trigger or could it be the start of something. I am driving myself crazy with this. For anyone that has done the trigger shot, when was it out of your system? I know that each person is different but just curious. Thanks!