2 BFN, when should I test again??

A🌞

Anyone ever had this happen? No contraceptive used other than pulling out each time. I tested on the 31st of January and got a bfn but my period is still 8 days late and showing no signs of coming. Also I’m starting to get some nausea and other symptoms. I tested this morning with FMU but still negative.

Should I retest? And if so when?