"my twitching is spreading
..and I feel less strength in my right knee and feeling something is tighten around the knee and there also twitching in the knee"
Your kind of twitching is not an ALS problem. Also, if your knee feels less strong, that is not how ALS works. In ALS, you don't feel weak, feel tired, or feel anything--your muscle simply would not work and you would fall down.
You must stay away until a doctor examines you, Shovon.