Firstly, don't panic! Unless you actually forced things it's unlikely you actually broke anything. When you say it doesn't cock any more, what happens when you try? Does the wind-knob turn freely or is it stuck? If it turns easily you've either a) locked the shutter button down by accident (turn it to release it) or b) you've accidentally put it on "rewind" (turn the collar around the shutter button to release that)
If it turns but meets resistance, try this: with it uncocked, select the highest speed you can (don't worry about what speed it is). Now wind on GENTLY until you feel extra resistance and stop. Select the highest speed you can again. Repeat this till the shutter is cocked. Now select a correct speed and fire it and check all is ok.
If the above fails to work, then yes, you have bu**ered it up and it may need dismantling.
Zorki: 1e (x2), 2C, 3M, 4, 4K, 5, 6
FED: NKVD, 1g, 2e, 3a, 3b, 4L (x2), 5B, 5C
Kiev 4, 4A
Yashica Minister III
Zenith C, Zenit C, Zenit E
Minolta XG M, Z1
"The way to see by faith is to shut the eye of reason."- Benjamin Franklin