Your question hit home for me. I had my first baby in April of this year. At some point in the second trimester, one of my doctors mentioned that babies move less the more crowded things get in your womb. As things with my pregnancy progressed, I felt little movements (hand flutters or subtle shifts) but not big turns or rolls anymore. I was a little concerned but attributed to the baby have less room to adjust. It turns out that my baby was lodged in an awkward position for some time... His head was down and sideways (not sunny side up or down) and his left shoulder was pressing into his left cheek and jaw. When I was in labor he presented ear first and would not turn; because of his position I had to have an emergency C-section. Everything was (and is) fine, however had my labor OB not been so good and had he encouraged me to push, my son could have experienced nerve damage in his arm and in his face. Having said all this, I don't know what my prenatal doctors would have had me do if we'd known that he was 'stuck' in this odd position. There is no telling how long he was like that--I didn't feel him drop, or the lightening, at all. I am writing to encourage you to trust your instincts. I had a sneaking suspicion that something wasn't quite right, but I didn't say or do anything because I didn't know what things were 'supposed' to feel like and I felt little tiny movements and thought that those must be it. Luckily, my situation worked out well despite my reticence to voice my concerns. I think talking to your doctor or nurse will, at the very least, make you feel better. Good luck!