Ay, swelling during pregnancy is so normal, especially kapag naka-upo ka ng mahabang oras sa work like you, a few of my mum friends had the same thing around 3-4 months pa lang! Just to be sure it's not something else, best to mention it to your OB sa next check-up, lalo na kung super painful or sobrang laki overnight, kasi sometimes they want to check your blood pressure din. In the meantime, try to move around kahit konti every hour, keep your feet elevated when you can (love your night routine na yan!), drink lots of water, and wear comfy, loose socks, avoid anything tight. You're doing great already with the compression and elevation, so don't worry, pero laging better to let your doctor know para ma-monitor lang properly.