hi im usually very regular like clock work with a 28 day cycle (very lucky i know) but i am now 3 days late but all test are negative. My boobs are so tender and sore i ant wear a bra , ive got back ache , period pain on and off (and have done for just over a week now). I keep diary for my cycles and make a note of it when we have sex so i can work out when ive concieved and strangely onn cd20 i had fertile discharge but hadnt had sex or 5 days ( trying for a girl) so i couldnt have mistaken it for sperm . we had sex the same night so im wondering if i caught then and ovulated late that would make me about 10 days after conception so it would be too soon to get a positive ? am i going nuts?? can somebody help lol x