I hade sex on July 30,12 well it wasn't really sex. But I did it unprotected for about 5 minutes or more. Then I'm worried that I might be pregnant I got my period on aug 18 ,12 my normal period. But now this month September is weird I was suppost to.get my period on the 15 but got it on the 18. Im so.scaried. That my body feels like its changing .

Being 3 days late is normal. Most women do not have it like clock work, I will assume you are not on birth control pills. Even missing a period can be normal.

You had a full period and started another one, no you are not pregnant.

And there is no "almost sex" if the male entered you, just once for a few seconds, that is sex, not enjoyable sex, but sex. So yes if it was 5 min, it was sex. And yes, any penetration, if for 30 seconds or 5 minutes can cause pregnancy

It was sex or it wasn't.

Since you had your period for the two months following, you most likely are not pregnant.

Oh okay thanks its just I'm so worried like my body feels like its having pregnancy symptoms so I don't know.

Worry can cuase this, and most pregnancy signs are also the same for infections or STD that sex can bring