late period please help

right i need your help ladies

im on a 28 day cycle, never late always 1 day early or on time.

had sex on the 12th April with pree seed, ovulation was the 13/14

period is now 2/3 days late as was due on Friday and I always come on in the morning...

done 2 first response both negative, done a cheap £1 one still negative.

got sore breasts, mild cramp, watery discharge which keeps making me think ive come on and i haven't... im getting so fustraited now that all the tests are negative but my period is late and I'm never late 😣😣

has this happened to anyone and its come out they are pregnant?