I'm pregnant and everyday I have been having pains in the lower part of my stomach, and also whenever I have sex it hurts.  Am I having a miscarriage or what?

Make an appointment with your health care provider to discuss your symptoms.  Causes for lower abdominal pains during pregnancy may include: a urinary tract infection, a vaginal infection, gastroenteritis, diarrhea, constipation and gas among many other causes.  I am assuming that you have been attending your prenatal appointments.  If not, it is very important to have prenatal care, and I encourage you to make an appointment ASAP.  Sex should be discontinued until you are evaluated.