Help Ladies😔 Second Post😬😬 Test Now Or Do I Wait?

Dasha
So my period was due the 28th & it's three days later with no sign of it even coming. I'm not sure if I should take a test or if I should wait longer. An yes my SO & I are very sexually active. An we do not use protection since we've been together for awhile. Anyways,we been going at it like crazy since I got back in town about a month and half ago. 
What should I do? I don't want to worry because I know that can delay a period. Should I test now or wait?