Clearblue digital

I'm a day or 2 late and took a clear blue digital today and it was negative is there still a chance or is it no? It says it can predict from 4 days before you period is due so if I'm overdue and it's negative shall I just accept its a no? 😟 I ordered the test online and it was delivered to my work today and I was too impatient to wait till my morning wee so took it late this afternoon would that effect results too or am I just desperate for hope?