My cycle is generally 28 days, but I tested positive on a Ovulation tests for the 21st/22nd June which is 21/22 days into my cycle for this month, I should be due for AF today - 1st July, but I realise that if you ovulate late then you shouldn't expect your AF till later - but within the last hour or so, I've started spotting, barely nothing, mainly just when I wipe [TMI, I know, Sorry!] pinky-red.. I basically have been having random symptoms, sore breasts, backache.. but I'd put everything down to being AF type stuff, but this is different, I've never spotted in my life.. Took a HPT on Wednesday and it was negative..Could I be pregnant.. and when would I be likely to get a more accurate answer test wise? 
Sorry, completely new to this, not sure what I'm doing.. Any help and advice would be brilliant :) Please and thank you!