Cramping at 5 weeks?

I am almost 6 weeks with my first babe, and I'm super nervous because I am not having many traditional symptom. I am extremely tired and dizzy, but no breast changes yet, no morning sickness, etc. I'm nervous because about a week ago I start to get light cramps on my left side of my belly button. They are intermittent and sometimes sharp but mostly just feels tight. I also occasionally get the same type of cramp right above my belly button too...