Legs/feet pain and swelling; when to worry?

rachael
(First time mom here) 
Is there ever a time when I need to tell my doctor or take action because of feet and leg swelling/pain? Or is it just normal? I thought I wouldn't have this severe of pain this early, I'm only 24 weeks along. It's so so painful I can barely walk. My husband just puts his hand on my calf and it hurts. Is there anything I can do?