10 days late! Took a cheap dollar store pregnancy test 2 days ago negative. What the hell?!

I am 10 days late. I keep getting my symptoms before I get my period sore boobs, back pain, fatigue, and mood swings. I took a cheap dollar store pregnancy test it came out negative. My list view on this app says 39 days. I usually 26-29 days. I only have one that 33 days