One of the first things that happens is nausea... oh what fun! I have been sick every day, for about half the day, most days I vomit numerous times throughout the day. I can steer it off if I am really full oddly enough. If I can stomach the food long enough to get it in and fill up the belly, I mean real full then the nausea passes. How bizarre! I have taken a real liking to orange juice, I mean I drank a whole jug yeaterday LOL
So the good... your sense of smell is heightened when you become pregnant. I did groceries on the weekend and I was walking around in the produce aisle, daydreaming a little as I was by myself. All of a sudden I got a strong whiff of peaches, so strong I could taste them. My mouth started to water, I felt like something out of a commercial. I was looking around for them and it took me several minutres to locate them as they were 3 aisles over... Now thats a nose!!!!!!!!!! It was a really enjoyable experience!
By the way, I am 7 weeks!