PREGNANCY QUESTION 👶🏽👑

So we've been TTC for 3 months now! I've been off of my period for only 1 week (Since June 6th) & I've been crazy emotional for the past 2 days. I'm not necessarily sad. I'll just feel so much emotion and then just bawl, and then I'm fine 10 minutes later. We did have sex toward the end of AF and have a lot since then. I've also been nauseous all day today. Is it possible to be experiencing symptoms of pregnancy this early? I don't want to get my hopes up but I would like to know if that could explain the crazy hormonal changes. I've never felt like this & I've had my period since I was 11! (I'm almost 19 now) Please help! 🤗💕