How soon after getting pregnant would you say symptoms can start?

Just a question, even for women who are pregnant right now, just to have a little bit of sort-of statistics on when women feel symptoms, since we all know each pregnancy, even for each person, is different. I wanted to know though also everyone, when do you think is the earliest for symptoms like tender , fatigue, cravings to start? (How many weeks pregnant?) Just another statistic-type question :) Thanks!