positive result & period???

So I posted this yesterday. .and my husband and I are excited . . However we want to tell our parents this week but today my period was suppose to start and it just started like an hour ago . .i was just a spot on the pad I put on (just in case) and when I wipe it was very light but. .  is this normal? To still have your period and if so does it usually last the full 7days? Ps I took this test  two days ago