You'll have to take a test sooner or later if you dont start your period.
I know how it feels to miscarry and so do lots of other women. At the end of the day if the embryo is viable it will grow and develop if not then it's the body's natural way of saying so.
I know it was only a month ago you lost your baby, but if you keep thinking about losing this pregnancy too you are putting stress upon yourself that you really dont need. Try and think postively (I know easier said than done). I made the mistake of telling people and then had to tell them I'd lost it, so only tell your partner until you know everything is okay and the risk of miscarridge is lower (after the first trimester, it falls greatly).