Period 3 days later getting BFN

Woods2019

I suffered a miscarriage beginning of Dec 2019 and got my period on 12 Jan, we TTC during my fertile window, I ovulated. My period is currently 2 days late, I’m normally very regular, I don’t feel like I’m going to get a period however this morning I was experiencing nausea l, diarrhoea, slightly painful nipples so I tested got a BFN on clear blue digital.

HELP I’m so confused I’m currently on my honeymoon so I’m avoiding any alcohol etc.

Should I retest in a few days or in any of your experiences it’ll be a negative and my cycle is delayed?