Thats normal (: if it gets real bad and theres blood then thats when to worry
It's prob ur uterus stretching, I had pains like that it wud come and go. I had them pains more now than before and I'm 9 weeks and couple days
Pregnancy is not painless... You will experience these feelings and period like pains and cramps throughout your pregnancy.
Your uterus is growing and you are stretching you will feel it happening of course :)
Look online read about pregnancy and good luck I'm a first timer too