16 DPO no sign of AF and BFN

Looking for some advice / experience. Is my chart looking ok so far? Temps haven't dropped. Glow keeps changing my O day every time I say I haven't got my period yet. I was due on the 8th. Sorest boobs for over a week, usually I only get sore boobs a couple of days before AF. CM is creamy and cervix is high but feels medium-hard. The longest cycle I've had was 38 days, it's usually 31, but it looks like I ovulated due to temp spike, positive opk and EWCM all aligned. Should I just be patient and test again in a couple of days? Or book in at the Drs for a blood test? Have you ever had similar symptoms and did it turn out to be AF / BFP? Thanks in advance!