I Work From Home And Sit At A Desk All

I work from home and sit at a desk all day. My room is kept rather cold. I have gradually been feeling my leower legs as well as my hands and a ms tingly and my feet too. I'm trying to get up and walk and know how m finding it harder and harder. I don't know it it's from sitting but I am definitely dropping things and this tingling is starting to effect everyday things. What can I do to get things moving and get rid of this tingling feeling. Or is it too late