Ay alam ko yan, momsh! A few of us went through something similar during pregnancy at sobrang scary ng feeling na parang hindi ka makakabigay ng lakas sa isang side, nakikita ko why you're worried. Pero honestly, kailangan mo talaga mag-check with your OB para ma-confirm kung sciatica or something else yan, kasi 15 weeks pa lang ikaw at may maraming posibilidad pa, at dapat sure tayo na safe ang treatment. In the meantime, try resting on the opposite side, gentle stretches kung kaya mo, at avoid heavy lifting or prolonged standing, pero seriously don't delay the doctor visit ha para sure kami na okay ka at baby mo. Fingers crossed it's just pregnancy-related back pain na mawawala!