String being confused with UserData?

m.KeyDown:connect(function(key)
    LK=c.Lanes.LeftLane or c.Lanes.DownLane or c.Lanes.UpLane or c.Lanes.RightLane:FindFirstChild(tostring(Note2.Value))
    --[[if LK.Parent ~= c.Lanes.LeftLane then return
     else ]]

if key=="q" and c.Lanes.LeftLane[LK].Position.Y.Scale >=0.202 then
    --Bad1() 
    print("Bad")
elseif key=="q" and c.Lanes.LeftLane[LK].Position.Y.Scale >= 0 and c.Lanes.LeftLane.LK.Position.Y.Scale <= 0.161 then 
    --Cool1()
     print("Cool")
elseif key=="q" and c.Lanes.LeftLane[LK].Position.Y.Scale >= 0 and c.Lanes.LeftLane.LK.Position.Y.Scale<= 0.059 then
    --Perfect1()
    print("Perfect")
    LK:Remove()
--end 
end  end)

All Variables are defined but are omitted from this excerpt.

Error:bad argument #2 to '?' (string expected, got userdata) 06:02:18.294 - Script 'Players.Player.PlayerGui.LocalPricklyMagpie', Line 195

I know that UserData cannot be indexed but as you can see, I converted the UserData "Note2.Value to string. I dont know why the script perceives it as a UserData when it is suppose to be a string.