hopefull but getting negative test results..

my husband and I are ttc for some time now... every time I get a period my world is shattered... this month im late by 3 days and I got exited for a bit so I peed on every stick I that i could get my hands on lol but all of them turned out negative.. still no period, sometimes I feel nauseous in the morning or during the day but mostly, I think, it's because I want to feel sick 😔 anyway, should I wait a bit longer and see if I get my period or should I go get a blood test to see if I'm finnaly pregnant?