@Aster here is a symptom checker from The Mayo Clinic
Try to match up your symptoms as best as you can, then there will be a list of possible causes for your problem.
If you have insurance, there is usually an 800 number on the card that will connect you with either the information line, or directly to the nurse’s help line. You can ask to be directed to the nurse’s helpline. Then describe your symptoms (make sure you can tell them when this started, what seems to precipitate the symptoms such as walking around, or sitting for too long, or whatever it is. Explain exactly what the symptoms are, and if you have found any relief by doing certain things such as taking medication, or walking around, or elevating your feet).
Once you have spoken to someone at the nurse’s helpline, they should be able to tell you whether you need to make an appointment with your primary care physician, or whether to come to urgent care or the ER.
Hope you feel better soon.