Why doesnt my car crank after changing a water pump?

I recently attempted to change the water pump for my 91 98 oldsmobile regency elite but never did because i couldnt get all the bolts loose. I put the pump back on and tried to crank my car but it doesnt turn over now. ALSO, the car has a very rough idle and gets worse whenever i put the car in gear. The car has new platinum spark plugs,new coil pack,new spark plug wires,new pcv valve,fuel filter,and fuel pump. It also had a funky smell after the catalatic converter was replaced.