5 weeks 4 days, but I don't feel it?

I am 5 weeks, 4 days pregnant :) the only symptoms I have experienced are slight cramping, waves of exhaustion and energy, and severe bloating. However, I woke up this morning and I did not have any symptoms. This may sound weird, but I don't "feel" pregnant. I'm a little worried this means the baby won't stay...I am concerned I may miscarry (this is my first pregnancy). Has anyone else experienced a lack of symptoms?