In your electrum wallet do the following:
1) Hit the green button in the bottom right:
2) Select any server with that has number under "limit" on it:
3) Press ok
4) Shut down electrum (right click and close in taskbar will do)
5) Open it up again and let it sync. See if your bitcoin come back in wallet
6) Continue to do this until they appear (change to new server, ok, close, reopen, sync) - I have had to do it up to 8-10 times before they appear (unconfirmed issues)
let us know if that works