Its not bad when your period is late, it might just be of stress or a big change or something like that. Don't worry about it. Oh and you should just check if your pregnant if you had unprotected.
There are many reason's why you wouldn't start your period on time. Some are of coarse is being pregnant, Stress causing a period to be late, sometimes it is just one of those things that just happens for no reason. Certain amount of exercises can contribute to this also.
I start my period latE almost every month and I'm perfectly fine, hope that helps
Why am I so late on my period ? I'm now 11 days late and never normally late. I have not had sex but I'm getting really worried and don't want to talk to my parents about it .