can't bring myself to test

I need some insight. I had a miscarriage on the 9th. by the 18th my hcg level was at 1. My husband and I have been having a lot of sex since the bleeding stopped which was around the 14th. Since yesterday morning I've been exhausted and nauseous. Today the nausea is worse and last night I started getting a really bad backache. I usually get my period on either the 28th or 3rd. There's nothing yet and no sign I'm even about to start. The glow app said it should have come back yesterday.