My leg has been throbbing for 2 weeks?

I woke up 2 sunday's ago with a throbbing in my leg its belwo my knee but above my ankle, the whole caf and front of the leg, its a constant throb during the day and at night its like a growing pain, but i think at night its worse because i am trying to relax. It doesnt hurt to touch or rub etc but as soon as i try to cross my legs like to put pressure on it it hurts so bad. Does anyone have an idea of what it could be? Ive tried many differnt pain killers and sitting in epsom salts and nothing has worked.