pregnant? 🤔

So I'm only one day late, but I've been getting the WORST back ache, (never had this before) constant tummy ache and itchy nipples.. However I've taken a pregnancy test and it's a clear negative.. Does this mean I'm not pregnant? Seeing as I'm already late on my period and the test is negative? Is it accurate ? The waiting game is killing me, this is month 8 of trying! Baby dust will be much appreciated ! ✨✨