I'm 29 yr old female. ive had sudden onset of leg pain in both legs, its very painful and achy. its been happening for three days now. possibilities?

Leg pain: Sudden onset of pain in both legs may be seen with acute pelvic congestion or inflammatory disorders. Primary acute inflammation of the leg nerves and/or muscles(polyneuritis,polymyositis) is a less common condition and use of the limbs may aggravate the discomfort or there may be associated leg weakness. Since you're in such distress,see your MD or a neurologist for evaluation. See GYN as needed.