Pregnancy

So I need help😓 i don't know what to think or do... Me And my boyfriend had sex about 4 weeks now we had sex the 18-21st of June without protection but I got my period the 22nd of June till the 25th but on the 27th of June I had like pink discharge and now I'm late for my period I don't know if I should wait or should I take a pregnancy test?? My cousin told me awhile back you could still get your period if your pregnant so now I'm freaking out please someone help... Sorry if it is a little confusing