My legs are so swollen. Does anyone else feel extremely swollen right now?

My legs, feet, arms and hands have been so swollen. My feet hurt in my shoes and their super tight, I can hardly bend my knees because I feel like I have water bags around my legs. I'm also getting serious sciatica pain. Does anyone know what could be causing excessive swelling? & if it's normal to swell a lot around 25 weeks? FTM (: 

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