No, when my wife and I were boyfriend/girlfriend, she was late up to 3 months and she did not become pregnant. As young girls mature and become sexually active, many hormonal changes take place...
Yes, but there may be other reasons you are late, too. Stress, illness, etc. If you are really worried, buy an at home pregnancy test. However, they may not pick up a pregnancy at that early stage,...
It simply means your period is late. Even the most "regular" woman is occasionally late on her period for varying reasons, only some of them currently understood.