Ah mama, swelling at 30 weeks is super common, lahat ng kasama ko sa antenatal class na yan! It's usually just the extra fluid and weight na nakakaapekto sa circulation, lalo na kapag mainit o standing long. That said, importante rin i-check with your OB kung paano kalaki ng pag-swell mo and if may other symptoms like headache or blurred vision, para ma-rule out kung normal lang siya or something they need to monitor. In the meantime, try elevating your feet, drinking lots of water, and wearing comfy flats, pero definitely mention it sa next check-up mo, okay?