Hi, i need everyone advice on period stuff

Me and my bf have protected sex the last two weeks and my period suppose to happen on 15th but it seems that it doesn't and both of us are starting to worried, is this normal during period or maybe i might ger pregnant?

Do advice me

Oh i also get like some symtoms for period like tired, acne, headache and such.

Hope will egt answer from you all soon

I'm not sure but we never have unprotected sex before

I think so cause i never have late period before