Feeling sick... Too soon?

Kassie
This is my first month TTC and on Glow. I'm only on cycle day 13, I've been having headaches for 4 days straight now, and now my stomach is nauseous as well. I've heard these symptoms can be a sign of pregnancy..  Is it too soon to be feeling these symptoms? I have been off birth control for almost a month so I didn't think I'd even have a chance of pregnancy this soon but I feel like this may be some signs? I just don't want to get my hopes up.  Help!