Feeling like I got kicked down there!

For the past 4 days anytime I get out of bed or stand up after sitting I get a horrible pain in my groin/pubic bone area! Once I start walking it sort of goes away but it's the straightening up that kills me.  Feels like someone kicked me in between the legs and as if I'm all bruised! Anyone else experiencing this? I'm 29 weeks and read that it's probably the baby's head applying pressure to my nerves down there. I've tried taking Tylenol but didn't help, any other tips?