How long after possible ‘implantation bleed would people normally wait to test ? Any advice please would be so grateful x

Sophie • 5years ttc , the one time I did I found out at 12 weeks that it turned out to be an ectopic & I had my right tube removed , I also suffer from endometriosis , praying this app helps me ! Baby dust to all 👶🏼💗💙

So I’m due at Saturday. I’ve got a massssive family bash on Sunday, we literally get together once a year for a big piss up & bbq,

I think I may have had possible implantation bleed on Monday ... should I test before sat just incase or wait it out sunday morning if af doesn’t arrive , I don’t want to get wiped out just incase there is a chance, what would you ladies recommend ? Xx