Pregnancy does a lot of strange things to your body. First of all you have a new center of gravity, which is shifting as the baby grows and gains mass. Secondly the stomach muscles (abs) pull apart, basically they are being ripped in twain. Far easier for them to separate to either side of the growing mass than to attempt to stretch around the swelling (which is really fast for the body). Further that baby is putting pressures on body parts you may not be aware of, such as organ which in a healthy human you can not feel or recognize as being there. Such as the kidney, liver, intestines, etc. Lower back pain is common in pregnant women. Again you have this strange mass which is growing forward shifting your center of gravity from straight up and down to a bit forward - the bigger the baby the further forward the center of gravity shifts. The muscles of the back although strong and able to adapt relatively quickly will at the end of the day protest this new shift in mass. During the day you are mostly upright, sitting, standing walking, blah. So through out the day the loads are being applied forward and down - pulling on the muscles of the back - by the end of the day those back muscles have had a day long workout and will be sore, stiff, tender, complaining. At night the load is being carried, but this time it is from front to back, or side to side (depending on how you sleep) anything below the baby when you are standing is being relieved of pressures. Once you wake up and go upright the load shifts downward again, putting pressures on organs and muscles which will protest for a while, then adapt to the day's carrying of that extra "alien" mass. Back to the ab muscles. They do not completely pull apart along the full length of the abdomen. I thing a visual analog would be a zip lock bag where the bag is still attached at either end but you can unzip it to open the bag and you can push some pretty big stuff into the bag. For your stomach those attachment points is below the belly and at the sternum (mid base of the rib cage. At the point below the baby there is more tensions/stress on the muscle, gravity pushes the baby down onto that tender bit. the gap by the way in the ab wall is called Rectus Diastasis http://www.pvc.maricopa.edu/fitness/preg/guidelines.html gives more information. There is an illustration there which shows the abdominals being separated down the middle. Of course everything I said is NOT a diagnoses, they are only the most probable of issues you could be having bases on the limited information you could give in your question. Prenatal care is essential and your mid-wife or doctor should be consulted and examine for even the most minor of pain is warranted in any pregnancy, be this your first or tenth - no two pregnancies are the same at there is a potential (even slight) that other things could be going on which mimics the symptoms/pains of other "normal" things.

No. The abdominal pain is probably Braxton-Hicks contractions, which are just your uterus' way of practicing for the real thing. REAL labor contractions don't stop, they intensify. The back pain is normal after lugging around that large bulge in your front all day long.