6 days late but no BFP?

Ka
I've only recently started using Glow, but my periods have been very regular for quite a while. Always 31-33 day cycles. I'm on day 39 now. 
My nipples have been incredibly sore and sensitive which usually happens to me around ovulation. I've tested twice now though and nothing so far. I'm rather confused and I keep tricking myself into thinking AF started only to be proven wrong when I go to the bathroom. 
She needs to either bugger off and show me a BFP or come already ! This weird late limbo time is driving me batty !