You're probably not in trouble, you can go ahead and follow this link, follow the directions, and get the stock rom back on the phone. Would probably avoid rooting the phone again if I were you.
Flash Stock Rom
Requirements:
- Samsung Galaxy S3 Mini GT-I8190 ( N / L / T )
- USB Data Cable
- Windows Laptop / Desktop
- Odin3 v3.07
- Stock Rom ( Main / Mirror )
- Stock Recovery ( CWM / Odin )
1 Install Recovery:
CWM =
- Copy File onto sdcard
- Place sdcard into Phone
- Boot phone to Recovery Mode ( Hold Vol Up + Home + Power )
- Click Install Zip from sdcard
- Find downloaded file on sdcard
- Click Install this Zip
- Wait till completed install
- Click Reboot Device
Odin =
( DO NOT LOAD PIT FILE IN THIS METHODS )
- Extract Zip Folder's
- Boot up Odin
- Ensure that the RE-PARTITION is unchecked, only the AUTO-REBOOT and F.RESET TIME are both remained checked.
- Place Phone into Download Mode ( Hold Vol Down + Home + Power ).
- Plug Phone into Laptop / Computer via USB
- Wait till get Connection Sign.
- Press PDA and select downloaded recovery ( .tar file )
- Click START
- Wait till get a PASS.
- Boot up Phone
[2] Install Rom onto Phone
Single Package =
( DO NOT LOAD PIT FILE IN THIS METHODS )
- Extract Zip Folder's
- Boot up Odin
- Ensure that the RE-PARTITION is unchecked, only the AUTO-REBOOT and F.RESET TIME are both remained checked.
- Place Phone into Download Mode ( Hold Vol Down + Home + Power ).
- Plug Phone into Laptop / Computer via USB
- Wait till get Connection Sign.
- Press PDA and select downloaded Rom ( .tar file ).
- Click START
- Wait till get a PASS.
- Boot up Phone
Multi File Package =
( DO NOT LOAD PIT FILE IN THIS METHODS )
Image 5
- Click START
- Wait till get a PASS.
- Boot up Phone