First Symptoms?

My partner and I are ttc our first, and I am super nervous because I am high risk, which I found out when I had a miscarrige 4 years ago. My question is how soon did everyone notice pregnancy symptoms? I've been super nauseous and seems like EVERYTHING stinks, even if nobody else notices it, and some of my fav foods taste so weird it makes me nauseous. The issue I'm having is if i am pregnant it's only 2 or 3 weeks. Does that seem normal?