how early in your pregnancy did you start symptoms?

This is currently my third pregnancy. My first prenancy I had every symptom in the book except heartburn. I had morning sickness for the first 5 months. Like it was almost two years ago I don't remember when I started with nauseous feeling. In December I had a miscarriage at 7 weeks but the only symptoms I had was peeing a lot and sleepiness. Now I'm 5 weeks pregnant and the nauseous feeling is kicking in. There is a certain smell in my kitchen that makes me want to throw up and beef and ham are starting to gross me out and I think chicken is next. I swear there are times I feel like I have heartburn. I'm just wondering if it's too early to be getting morning sickness and heartburn or if it's all in my head like I know I'm pregnant.