At the end of June, a few days after my period ended, I had sex four times; once unprotected by mistake during the time that I was supposedly ovulating (the pull out method was used), and the other times using a condom. It's now July and although my period came on the day it was supposed to (19th), i'm still super worried that i could be pregnant.

The symptoms I've been experiencing are:

- nausea 24/7 for the past two weeks.

- no appetite, and when i do eat i get full after a few bites, and the smell of anything nauseates me.

- my nipples and the bumps on my areolas are always erect, but im not sure if thats because im always cold. 

- constipation

- hard to breathe 

are these signs of pregnancy?