Your are probably feeling stretching and pressure that come from your baby settling more deeply into your pelvis. This does not mean that labor will start, but it is an indicator that you are nearing the final stretch of your pregnancy. If you experience any spotting, leaking of fluid, bleeding, or if contractions begin, call your doctor or go in to be checked. Here is some information that may further explain what is happening. Good luck, and please keep us posted.

"It's impossible to say precisely when your baby will "drop" or descend into your pelvis, because every pregnancy is unique. If this is your first baby, this process, which is also called lightening, is likely to occur several weeks before labor begins, though it may happen later. For subsequent pregnancies, lightening often doesn't occur before labor starts.

You may find that you feel a little different after your baby has dropped. Some pregnancy complaints may get worse, while others may improve. On the one hand, your baby will be taking up more room in your pelvis, so you'll probably find that you have to urinate even more often than before. You may get an uncomfortable feeling of pressure deep in your pelvis, feel increasing discomfort when you walk, and even begin to waddle a bit.

On the other hand, with less pressure on your stomach, you'll be able to eat a little more without feeling uncomfortably full, and if you've been suffering from heartburn, you may get some relief. You'll probably find that breathing feels easier, too.

While lightening isn't a predictor of when labor will start, it is a sign that your body's getting ready. It's normal to feel lightening up to four weeks before your due date. If you feel an increase in pelvic pressure or the sensation that your baby is "pushing down" before then, call your healthcare provider so she can evaluate you for preterm labor." (http://www.babycenter.com/404_when-is-my-baby-likely-to-drop_1460217.bc)