I had an unusual delayed period. I was so stressed a week before my normal date. Then I had my period it was a 2 day heavy period then nothing. What could it be? I had sex but he did not came inside me. And he did not insert his thing inside of me.

You were stressed before your normal period start date and stress is known to cause weird things to happen to your cycle, like a late period. You had your period, meaning that you're probably not pregnant.

When you have sex there is always a chance to get pregnant. The chances don't lessen that much if he doesn't ejaculate in you, but do if his penis doesn't penetrate you.

It was probably stress.