Honda Civic problem :(

I was driving on a highway and was going up hill so I had to shift down from 5th to 4th gear and as I was doing so the car suddenly made this "Shh" sound and the headlights went dim for a moment, after that I tried to gain speed (I wasnt on the hill anymore) and the car didn't do anything, just kept slowing down and shaking a little. Thankfully I had enough speed to glide into a near roadside turnover, and the car stalled. Then I turned it back on, and tried to get it moving but everytime Id try to release the clutch and put on gas the car would stall. I towed it back home and managed to drive a little around the block, but everytime Id change the gear the car would shake and stall. What could this be? Also now when I start it, it shakes, and the engine slowly slows down. Please Help!:banghead:

does it seem to happen only when your foot is in on the clutch

yeah, when i try to put some gas on and still not letting go of the clutch completely

sounds like a broken throw-out bearing.. i had it happen before, it does shake like crazy....