Period late

Katie • Married 2 years. TTC baby #1

Okay so hubby and I have been TTC for 5 months now. I went off BC and since then my periods have been very regular. Like still on the 28 day cycle. AF was due on Wednesday this week and was a no show. Tested on Thursday morning BFN. AF still no show now 3 days late. This is VERY unusual for me as the most I’ve ever been late before was 1 day. The thing is I’m starting to wonder if I didn’t do the test right. I always pee in a cup and test that way but this time I was being lazy and tried peeing right on the stick. Not sure what to think. Should I test again?