No period but negative tests

Onyx

So I was supposed to start on the 12th but here we are on the 16th with still no period. I’ve never missed a period so I thought this was finally it but between the 14th and just a few minutes ago both tests I’ve taken r negative. Me and my husband have already been through one miscarriage and if this is my rainbow I don’t want to screw it up since we r taking a trip next week. Any help is welcome