32 Weeks
According to The Pregnancy Countdown Book...
"From head to toe, your baby is about 18.5 inches (47 cm) long. This explains why you feel like there's a foot up around your ribcage. There probably is a foot or another body part in your ribcage.
Your baby is running out of room, and you're running out of patience (big sigh). You still have 56 days to go - or more. The end of your third trimester is when life in Pregnancy Land can get really hard again. You may still be working and anxiously awaiting your maternity leave. You may not have shooting pains down your legs during the day and bad leg cramps at night. Many women experience fatigue and PMS-like symptoms. To make matters worse, sleeping comfortably is difficult, if not impossible. By now, your significant other is either in the guest room, on the couch, or being smothered by your boyfriend Bob, the full body pillow, and a host of other pillows."
8 more weeks.... 8 MORE WEEKS! *Gah*