Does anyone else have bad testing days?

I've recently come to realise that the days I'm due on are important days to me for example I was due af on Christmas Day didn't arrive on time but bfn, and again this month my period is due on my birthday 16th April obviously I'd like to do a test as this month I'm feeling kind of lucky and it would be the greatest birthday present ever, was wondering if any has had there af due on important days and it made them worry it will ruin there day if to get bfn, I don't want it to ruin my birthday :( xxxxx