help diagnosing problem please!
 

so a couple days ago, something that has to do with my tranny or clutch has gone wrong, or so i think. at a complete stop, in first gear, under the right conditions the car does this weird thing where when the clutch is pressed in all the way, it feels like the car has an ultimate stall (super rough feeling, like someone rear ended you). the car doesn't actually turn off but the revs lower a bit and if one were to take it out of first, it won't really go back into any of the gears. Could this be my throw out bearing? thanks in advance, sorry if i sound newbie:)

edit: also forgot to mention that it pulsates in first gear when at the friction point

bleed the clutch control system...sounds like the clutch is dragging...