I was spotting 2weeks agos for two days i had unprotected sex prior and on those days. my period is 3days late hpt was negative?

Get tested for STD: Having unprotected sex makes you are at high risk for a sexually transmitted disease (STD). STD can cause all types of menstrual irregularity. You should be tested for STDs to be sure. As you know you are also at risk for pregnancy and if you are only 3 days late, you should check another pregnancy test in a week to be sure. Protect yourself, to avoid STD, use condoms consistently.