Hindi ko masyadong malalaman based on description lang, mama, kaya better check with your OB to be sure, sharp pain can be different things and mas comfortable ka lang if doctor confirms it's just Braxton Hicks! A few of us first-time moms din nag-panic sa ganitong sensations, pero pag nakita ng doctor na okay lang, nag-relax na kami. Since madalang lang at ilang minutos lang, sounds like it could be BH, pero definitely don't hesitate to call or visit your doctor especially pang peace of mind mo. Take care!