Period due today....no period....negative tests

Butterfly

Hi ladies,

So af is due today and I'm always bang on with my period starting. I have done 2 tests and both are negative. What the hell is going on??? Worried as I have had a few miscarriages as my hcg didn't build up and obviously if there isn't a line there then the hcg level isn't very high?? Just dont want to get my hopes up and feel really confused. Any advice would really be appreciated. Thanks