Important pregnancy question! Help

Okay ladies, as I posted recently I just found out that I am pregnant within the last few days. I should only be about two and a half weeks along, but I am having a very odd feeling in my stomach. It feels like a constant pressure in the upper part of my abdomen, and makes it feel like I'm having a little hard time breathing. I've also had mild cramping, and severe nausea this morning. The pressure is very uncomfortable though it's there throught the night and day. I can't make it to a doctor quite uet but I need to know what this could be and if it could be normal? Thank you so much