Red swollen bumps on body!? 32 weeks. HELP!

Mr
Before I call my dr, has anyone experienced this? My feet are both swollen and hurting. Now, I have a red swollen mark near my knuckle. Another one has shown up above my knee. I am drinking water, resting, limiting salt etc. Is this a common pregnancy symptom? A sign of something else? Looking for advice before I call my OB, I hate being the patient in for every little thing. Thank you in advance!