This sounds serous. You need to see a physician ASAP. This is not the time to wait.

Are you having any difficulty breathing or do your lungs feel tight?

Do your legs and feet often feel numb or have decreased sensation? Do you find injuries that you don't remember causing?

Have you ever been diagnosed with peripheral artery disease or congestive heart failure or any problem with circulation?

It might help in the short term to elevate your legs on a pillow while you lie in bed but don't use ice or heat when you do.

And get yourself to the doctor pronto!