Definately get a doctors appt. It could be something as simple as endometriosis but you want to make sure.
Abdomen
No, her belly button is not pierced. I've attached a related link below to show that she does not have one.
right below your belly button.
yes that is totally normal, but not until later in your pregnancy.
she has two tattoos. One of a butterfly below her belly button and a wishbone right above her belly button.
This means you are piercing your navel .. navel is the phrase for the area above the actual belly button** ( **other wise known as the umbilical knot)
It could be herniated. See link below.
It is what a person would call a "belly" and is right below the chest. The "belly button" (umbilicus) is in the middle of the abdomen.
They are located on top of the kidneys and normally are slightly above the belly button (navel). But there is tremendous variation in where a normal belly button is located on the abdominal wall.
About an inch below your belly button is often recommended, but most pro riders use boards that are 2-3 inches below their belly button. This works well for me as well.
If you have pain below your belly button and just above your groin, you could be either pregnant (pregnancy discomfort) or growing some cancer (testicular cancer for men).
According to my midwife, it is normal for your uterus to come up to about an inch or two below your belly button at this point in pregnancy. Around 20 weeks, it should reach, or almost reach, your belly button.