Hi,
aches and pains in early pregnancy are very common and normal. That could be from the ovary that released the egg.
Anyway, do you have a doctor. By now at 5 weeks pregnant they should be able to see where the pregnancy is located if they do an ultrasound.
If you have severe pain though, go straight to the ER for a check up.
Yeah when I was pregnant with my son I was in awful pain on my sides and lower belly I called the doctor every two seconds but now I got a health five year old alot of the times it's growing pains stretching and all the other changes!!!