Period late not too worried

I’m just curious, I am almost 1 year on birth control (the pill) and since taking it I’ve been on time with my period, but this time my period didn’t come, it’s my first one not coming on time. Now the question is, will I get a period still even though I start my new pack today? Also I haven’t had sex in the last 4 months and my period has been coming expect this month.