Little help please.

Okay since week 24 & 26 (currently 27) I have developed a ton of feet and leg swelling... more than average. Also pinched / compressed sciatic nerve in my left hip.

I have been trying to drink my gallon of water a day, plenty of movement for the nerve as a work fulltime in a machine shop. Putting my feet up mostly after 7or8pm. . . I'm kinda in a pickle until baby comes.

Any advice??? These two situations are almost counteracting each other.

Maybe try to lose weight?? I have gained more than enough , take the vitamin supplements... Should I just try to lose weight?