I am currently 20 weeks pregnant. Since today afternoon, I have noticed swelling in both of my feet. Yesterday, I went for my usual 40-minute walk and experienced some mild discomfort/pain while walking, but the pain went away after I stopped walking. Today, I noticed that both feet are swollen. The swelling does not leave a dent when pressed. Could you please advise if this is a normal pregnancy-related swelling and what I should do? Also, are there any warning signs that would require me to come to the hospital?