Feet are swelling up bad...

So far my blood pressure and urine test all have been normal. No signs of preeclampsia or any other medical concerns but today I notice my feet are swelling up really bad. I read that it happens once you get closer to your due date but the way they have swelled up just in the last few hours is getting me a bit worried. I am working from home. I’ve been sitting and had my feet dangling for the last 9 hours (working OT) so I know that has something to do with it but just wondering should I be making a fuss such as going to the hospital or calling my doctors or is this just normal pregnancy stuff...