Pregnancy symptoms

Just found out Im pregnant. I have always had irregular periods, and today that I went for my papsmear examn my gyno congratulated me on my pregnancy. 
Now my question is where are all thise pregnancy symptoms I should have. I dont have nausea, dizziness, my boobs are a little sore but mu nipples or areola are not dark and my boobs are not big. Im just tired and have a little cramping but i was always tired. 
Is anyone goind through the same thing? By the way according to my gyno I am 5 weeks pregnant.