cramps.. worried!!!!!

Hailey
Okay so the apps say I'm 6 weeks, I go to my 1st dr. appt March 27th. It's my first pregnancy and I'm 20 yrs old. 
For the first time I've been having very slight cramps in the "down there" area. Is it a miscarriage? Should I go see a dr? What signs should look for in a miscarriage? Or is this normal and I'm just worrying too much?