2WW after IUI

Can't find my other posts to update so making a new post and hoping previous people that were rolling will see this. We did trigger shot 2 weeks ago. The next day we did the IUI. The following day I took a pregnancy test because you can test out your trigger shot. Eventually it will leave your system and pregnancy test will be negative and then if you get pregnant the pregnancy tests will start to show positive and get darker if you continue to test. Well 6 days after my trigger shot I got a negative pregnancy test. Last night I decided what the heck take a pregnacy test. What could it hurt? Well within the 3 minute timeframe there was a 2nd faint line. So I took another this morning with 1st morning urine and again a 2nd faint line. Gonna buy another brand and test again in the morning. Dr said when 2 week wait is over either period will come or not. Either way I'm to call in the morning. Tomorrow is 2 weeks since IUI.