I'm 6 Weeks Pregnant And Today All Of A Sudden

I'm 6 weeks pregnant and today all of a sudden I'm feeling tingly and slightly itchy. Mainly on my upper back, arms, legs and my neck. Is there a reason for this? Should I be concerned? Is there anything that can make the tingling feeling go away? It feels similar to 'the flu' tingly feeling but with no other symptoms, except some nausea.