Ovidrel shot & pregnancy test

It is 8 days past the HCG trigger shot and I have a faint positive on a pregnancy test. The line was obviously very dark at first, got lighter and lighter and today it is a little darker.

Is it possible that this is still a false positive or is it out of my system by now and this is a positive pregnancy test?

250 mg ovidrel shot 8 days ago, had an 18.1 progesterone level two days ago.