I have my period every 31 days on the dot for the last six months.  I am now four days late but tests are still negative.  I have felt some symptoms but am afraid I could be wishful thinking.  I already have three kids but we weren't actively "trying" with them and so I wasn't keeping an eye on my period back then and so never took a test until it was super late.  Therefore I've not had a negative test before.  Anyone else get negative tests at this point? When should I test again?