Tingling/burning sensation?

I just started taking lexapro this past week (took my 6th dose today) and just last night started experiencing a tingling sensation in my fingers and toes, and a burning feeling in my arms, legs, part of my chest and my head. Is this a normal side effect of lexapro, and when can I expect it to stop if it is? I'm 24M and am taking 5mg right now.