I'm like 6 or 7 days late but i got a negative on two test?

oka so im like 6 or 7 days late for my period.

i shouldve gotten my period on february 15th.

but i didnt get it. i dont even have cramps like im going to get it.

my boobs are sore, i do feel more sick than normal. i have done some researching but really found nothing.

i did have unprotected sex (were trying to get pregnant).

but has this happened to anyone else? were you pregnant or not?

i only live with my fiance.

i took two test on like saturday. (one that tells you 5 days before your missed period)

still they came out negative.

is it too soon to tell. right now if im pregnant id be like 5 weeks pregnant. when is the best time to take a test.

like i was told to wait ten more days to be sure.

what is going on??