Here's what you should do:
1. Stop immediately. Do not attempt to start the engine.
2. Call a professional mechanic. Explain the situation and ask for their advice. They will know the best way to handle this situation.
3. Do not attempt to drain the engine oil yourself. This can be extremely dangerous and could worsen the situation.
4. Have your car towed to a qualified repair shop.
5. Do not drive your car. Driving with brake fluid in the engine could cause catastrophic damage to your engine.
Why is this so dangerous?
* Brake fluid is corrosive and will damage engine components. It can dissolve seals, hoses, and other parts.
* Brake fluid is incompatible with engine oil. It will not lubricate engine parts and can cause serious damage.
* Mixing brake fluid and engine oil can create a highly flammable mixture. This could lead to a fire or explosion.
Remember: Never try to fix this yourself. A professional mechanic is the only one who can safely assess the damage and repair your engine.