The patch

So I just started the patch form of birth control my period comes on every month on the 24th faithfully I accidentally wore the patch on the week I wasn’t supposed to and my period hasn’t came on I had protected sex like 2 weeks before I even started the patch so I’m not worried about that I just don’t understand why I missed my period also I’ve been feeling really tired and my emotions have been all over the place since I started it is that all normal? This is the first time I’ve ever been on birth control