Leg cramps during pregnancy ay napaka-common talaga, lalo na towards the second and third trimester, pero ang manigas na tummy naman ay need mo i-check with your OB kasi pwedeng normal Braxton-Hicks contractions lang or something else na kailangan tiyakin. For the leg cramps, drinking enough water, stretching before bed, and getting enough calcium usually help, pero if sobrang sakit or may ibang symptoms, better to call your doctor na para peace of mind mo.