Hi dear,
I had gone through your question and understand your concerns.
You haven't mentioned your age, have you gone through any surgery, or are you with high salt intake, any medications, any medical history..
For my patients i suggest compression therapy for immediate help,ice pack also helps a lot.
Avoid long standing,long sitting,few exercises which will surely improve the condition as ankle toe movements,toe squeeze,resistance band in and out,foot rocker,tennis ball
massage,elevating your leg and foot while sitting and lying with a help of the foot stool or a pillow.
Check your weight, focus on hydration,low fat and improved diet, keep exercising,stay calm don't panic.
If the condition doesn't improve do visit to a your doctor.
Wishing you good health.
Hope this helps.