please help me work out this possible pregnancy nightmare!

[OldMargaret]

So yesterday I tested a faint positive and today negative

I just want to know if any experts are out there that could help with my dates at all?

I was using the clearblue advanced and had a solid smile on Monday 30th December so assuming I ovulated either that day or 31st which is now 14DPO so should be showing as pregnant if I am right?

Ive had the worst breast pain all weekend and up to now and have just had a wipe of blood blood after going to the toilet which I’ve never had

Just wondering how late implantation can actually occur as maybe this is what’s throwing things out for me!

Not in any way an expert but I had what I assume was implantation bleeding somewhere around 10 days after estimated ovulation, I assumed it was my period and didn't test but then got really sore boobs. Can't remember when I got a strong positive, I guess you just need to leave it a few days and test again?

The brown mucus type blood hasn’t been seen since - all very odd as should be 14DPO which is too late for implantation bleeding from what I’ve read anyway
I will test Monday if AF doesn’t show over the weekend x