Aw, common yan sa pregnancy especially as the baby gets heavier, ang legs at hips natin talaga ang first na napapagod kasi they're bearing all that extra weight! A few of my mum friends said the pain got worse as they went further along, so it's good you're only at 23 weeks pa lang, pero definitely mention it sa OB mo next visit para sure walang other issues like blood clots or something. Try resting with feet up whenever you can, wear comfy shoes lang, at some of us swear by light stretching or prenatal massage, it really helped ease the ache! Hydrate din plenty, and don't hesitate to ask your doctor if you need anything stronger for the pain.