Weakness/ numbness in legs and arms, dropping things?

This has been going on for about five weeks, thing is first time around it was only weakness in one arm, tips of fingers feeling tingly, moving arm i felt a strain kind of feeling, it didn't hurts but it was frustrating because when I'd 'tell' my hand to go 100% it would only do 50%. Anyways it hasn't been that noticeable since, it 'faded' rather than going away completely, anyways today i felt a strain i my calf muscles however i move its like expanding a rubber band, its hard. Standing straight up is managable for a few minutes, standin up for 20-30 mins till i have to sit down, because my legs just cant 'stand'. If I'm standing and bend my legs, its a big no no and I cant stand with them bent at all. Arms are feeling weak, both of them this time. We were decorating the Xmastree today and I kept dropping the ornaments. Sometimes my speech is slightly slurred and i 'forget' for a second what it was I was going to get/ do. But it's like im too lazy to talk/ think, if that make sense.