I did that, and now the transaction of me sending the BTC is gone and my spendable BTC is still at 0
Can you post address where you received those btc ?
Edit: damn i was on mobile and didn't saw you already tried reset option.
check your address on blockexplorer, what's it's showing now, and make a new post about it in multibit forum so a expert user can help you.
Ps: Read about it here
https://github.com/jim618/multibit-website/issues/58