Bfn 😭 4 days late for AF....

I am 4 days late for AF, according to glow I was due on 3/22. Have not seen any sign of AF. The last week and a half I have been nauseous, cramping, headaches, and creamy white discharge. Took a test this morning and it was Bfn... 😭 I am so upset. Is there any chance I might be pregnant and I just won't show up on a test yet? I'm gonna wait another week and test again if AF doesn't show. But I'm just getting so frustrated and depressed. How do I cope?