Ay, normal lang yan mama, bawat tao magkaiba ang belly size kahit same weeks, so don't stress, but ang leg pain mo na 2 days na talaga at hirap ka mag-lakad, parang worth checking with your OB na to make sure it's just the usual pregnancy aches and not something na kailangan i-monitor. One of my mum friends din nag-complain ng ganyan pain around 31 weeks, naging better siya with prenatal vitamins and mas frequent stretching, pero syempre bawat pregnancy different kaya best talaga na marinig ng doctor kung ano exactly ang nangyayari with your legs at the small bump nyo.