Back to Glow after MC and needing a sanity check

So I'm back to Glow after a break after our MC. I don't know if I would be here so soon if I wasn't so confused by what's going on with my body. 
MC on August 19 
AF on September 22. 
I have a 28 day cycle. 
Now nothing. No AF. No BFP. Three BFN
I'm one week late. Is this normal? Could I be pregnant? Should I take another test in a few days? Should we wait till after next AF to use OPK? So confused and scared.