i drive my car everyday to skool, but today when i went to drive it i felt a difference.. like it would feel like as if i left the ebrake half way up and drove to skool.. when im in 1st gear at 15mph i would be at about 4000-5000rpm which isnt usually.. so does anybody know what it could be?? my brakes rubbing??

 

clutch slipping perhaps, if its cable tranny try to adjust the clutch knob a bit