Hello. A Few Days Ago I Started Getting A Odd

Hello.
A few days ago I started getting a odd annoying pain in my left legs. It's now got worse and I'm limping. The best way I can describe the sensations I'm feeling is it's like lactic acid build up, tingling, pins and needles in my foot, a hot/cold/slight burning sensation throughout my leg, pulling feelings? Especially in my calf?
I've stretched and been taking painkillers! Nothing is working! I live in Australia and it's a public holiday so I can't call the doctors until tomorrow. Is this something really wrong? I'm really stressing! What's your opinion?

Kind regards, Jade.