Ideas...?

So I'm late. 11 days late, according to this app. Last period ended Oct 15, after bleeding for 11 days straight. Periods have been getting progressively longer over the last 3 or 4 months, PMS mood swings have gotten worse and worse, acne breakouts, painful cramps, the works. Haven't had issues like this since I was a teenager, and I'm mid-20s now... Took HPT around the beginning of Nov. Negative. Have been sexually active a few times between last period and today. I have the Skyla IUD, due for new one Jan '19, scheduled replacement the end of Nov since I've heard Skyla can run out of hormones early depending on your body and other factors, etc.

So what do you think, Glow community? Preggers? Stress? Do I request a pregnancy test before my IUD replacement in a couple weeks if I have yet to bleed?