A., my little guy is now 5 months, and I was pregnant this summer- he is my third. OMG the pressure I felt!!! We would try to walk around our block- very short distance, and I could barely make it. I had to stop so much. It almost felt like a burning sensation in the groin and inner thigh. I also thought the baby was ready to pop out! It started around 7 1/2 months also! God forbid we would go to the mall! I did get checked, and everything was ok. I was early by 3 days for the due date, so nothing crazy there, and he is just perfect. At night I would also get shooting pains, as if he was trying to kick his way out- and he was head down for the longest time. I would be laying in bed and all of a sudden I would yell out in pain! It would scare poor dh. It would go away shortly after, but oh my did it hurt! I wasn't having contractions or anything, just a LOT of pressure. Not sure if it was because it was my third, and the body just fell back into pregnancy mode sooner or what? I was also older- 39 and my other two are now 12 and 10!
I wouldn't be too worried about it, but by all means, call your dr and make an appointment to get it checked. I was high risk due to my age, so I had more regular appts at that point, and would mention it when I went in. Everything was ok, he was just resting so low that it caused all the pressure.
Good luck, and keep us posted!