Ay alam ko yan, first time mom jitters talaga! At 5 months, feeling baby movements pa lang mixed with gas o uterine twitches is super normal, marami sa amin nag-experience ng ganyan, parang vibration or mild shake na hindi maexplain, especially pag gabi or pag nag-settle baby. Since wala kang spotting, cramping, or other warning signs, it's likely just your body adjusting to pregnancy, pero since you're worried, mas makakatulog ka ng mahimbing if you mention it sa OB mo on Aug 25, they can check everything properly and give you peace of mind! Hindi mo kailangan mag-panic ngayon, pero documented na sa doctor is always the safest move, lalo na first time mo.