2002 MG ZR I mix brake flude in the cooling water system

Engine Cooling problem
2002 MG ZR Four Wheel Drive Manual 57000 miles

mistakely I have mixed brake flude where water shoud be in I dont know wather to stop driveing it or get it fixed the whole engine no one understand me it happen 3 days ago now my car getting hot do you advise me I should put water duilted do you think this will solv the problem or is there another way pls if you have any idea let me know thankyou.