20yr female reletively healthy experiencing pain in both legs, comes and goes, on pain scale 5 mostly calve area no swelling or redness, been 4 days?

Difficult to say : Without a physical exam and more history. However, a common cause of a constant leg ache in a female your age is anemia. You may want to ask your physician to check a cbc. Also, try hydrating well. If you have had any b trauma and bilateral leg pain is coming from a traumatic injury in your back, see doctor soon. Hope this helps!