Are you a doctor? if you are, could you please post what type of doctor you are?
You need to go to an emergency room as this can be related to an infection you may have received during your pregnancy. This can also be from once losing too many nutrients.
Medicaid will take pregnant women...you need to go and apply for pregnancy medicaid..contact your local township trustees or hospital and ask where you can get health care according to your income. Start researching this now!...You need to see a doctor immediately.
Do you have a bulge anywhere at the surrounding area? I think you could have an umbilical hernia. ( you don't need a bulge for it to be a hernia)