My period is 16 days late the last month it was 7 days late I'm always hungry after I eat I took a test and it said I wasn't so can somebody tell me what's wrong and yes I do have unprotected sex

How old are you?

So you are trying to get pregnant ? Are your periods normally very regular ?

Is there other stress, a change in medication or work.

A regular check up should help in finding what the problems are