I saw something online that swelling in the legs is normal but also a possible sign or preeclampsia. How do you know when too much swelling is a bad sign? I'm off my feet a majority of the day but when I'm at work I'm on my feet for 3 to 5 hours straight (not very long I know), my feet and calves will swell and start to hurt like I shin splints. I am only 18 weeks, 4 days and have only gained about 8 pounds and don't think they should be swelling and hurting this bad in that short amount of time. I'm not overweight I'm actually close to being underweight, tall (6'1-2) and skinny. Don't know if those could be the issue.