NEED HELP!

According to my calendar I am supposed to get my period September the 13th which is Wednesday. And I also have a concussion from my brother.

So Here’s my symptoms,

-Headache

-Light cramps

-Hunger for chips & juice & burgers & Chinese food

-Tender boobs

-Tired after school

-Gassy

-Burpy

-Bloated

-Constipation

And on top of that a whole lot of STRESS!

I did have sex 3 times last month in August 2017... one time on the 23rd lasted for about 3 minutes, no one cummed... 24th for about another 3 minutes but my legs got caught an accidentally too the condom off and so we stopped, 28th which was one day in my fertile window and I cummed but he didn’t which was about another 3 minutes. All checked condoms with no rips or anything ! So I’m pretty sure I’m not pregnant and I’m just making sure these are signs of PMS and not pregnancy... not so worried about preg at all. But I looked up my symptoms and it’s all PMS or pregnancy! So I’m getting all stressed out :/ need some normal adult people advice because you never can trust the internet. Someone please!