1999 Dodge Intrepid loud knocking

Hi I just bought a 99 dodge intrepid and the next day I had a huge oil leak and went to get that fixed and what happened was the the threads on the barring were gone so need to get new threads on the inside and now after having it two days there is a loud vibrating knocking noise fells like under the passanger side feet but also under the hood and still can not figure out the problem and scared to drive it now waiting to see what happens need help!