Can anyone help me with the wii nunchuk?

And when I use the nunchuk and go down, it goes up half the time…it’s really annoying
My nunchuk seems to be stuck moving forward at random times and I tried replugging the nunchuk but it seems like it doesn’t work. This has been going on for 3 days and I’m not sure how to fix it.

I read somewhere that A, B, +, and – all held together reset the nunchuk but I’m not sure if it’s working or not.

Anyone have the same problem? This is really pissing me off as I can’t play resident evil 4, CoD4, Metroid Prime (shooters =/), or any game properly
Oh, and when I swing my nunchuk to the right, my character moves forward. It’s really strange…