keyboard and mouse acting strange

all of a sudden tonight my keyboard is missing out letters when i type and when i go back and hit the key again it wont work but if i wait a minute or 2 it works but it happens with all the keys not just one in particular and sometimes now they seem to stick so if i press the letter "a" it will come out as aaaaaaaaa

my trackpad is staring to go where it wants to even when i'm not touching it
and also when i use 2 fingers to zoom i have to lift my 2 fingers off the trackpad twicee sooo that it actually works

any ideas what might beeee causing this

 

could it be? seems strange it just appears out of knowhere after 5 months

i have the 3 year cover