to check if your clutch is going back, while driving in lets 3rd gear @ 30mph, hit the gas & see if your RPMs jump. if your RPMs jump but your car doesnt go anywhere (physically accelerate) that's usually a surefire sign that your clutch is done.
as far as what to replace it with- you didnt give us any info about your car at all.
if youre stock or at least stage 2ish- an OEM replacement will be fine. (do a search for exedy)