Late😁😁

Okay so I had an irresponsible night last month and had sex without a condom with a fwb and apparently according to this app it was on one of my ovulation days... So now I'm 5 days late and before I didn't think much of it, but 5 days I've never been this late before!! I mean I haven't changed my eating habits or exercise routines, I get the right amount of sleep, maybe it's stress but if that's the case I don't know what stress? But I don't know, I'm hoping it's just stress or something... Any advice??