Sayang, ini sounds quite uncomfortable lah, the hardening stomach combined with that sharp pain in your pelvic area especially when moving is something you really need to check with your doctor ASAP, okay? At 34 weeks, better safe than sorry. A few of us mums went through similar and it turned out to be different things, so your doc needs to see you properly to rule out anything concerning. Please don't wait, ring your clinic or go to the hospital if it gets worse or you feel anything else unusual. Sending you gentle hugs, and hope you get answers soon!