Help!!! Period is late but test is negative!

My period was due on the 12th. I'm usually right on time. I reset it on glow by pressing "my period is late" after 3 days with no sign of AF. It reset it and now it's supposed to start today. I usually feel crampy when it's coming but I feel nothing. I took a digital test at first, 2 days ago. It said "No -" for not pregnant. But I read that the digital test take a higher hormone level to say pregnant. So I bought blue dye CVS tests. Took one yesterday and I didn't see a line. Took the second one this morning at 7:30AM with my first morning pee and still no line. I don't understand. I had unprotected sex April 4th. The first day AFTER my green fertile window. So according to glow I would have ovulated already and sex on the 4th wouldn't have worked. I'm just confused why I'm not getting my period as every day comes and goes but the pregnancy tests aren't positive. Can someone give me some insight? Anyone gone through this? I will include a picture of my glow chart in the comments. (Like I said above, it now says I am due today for my period but that is because I clicked "my period is late" and it reset it. It was originally due for this month on the 12th.) thank you.