Hey i started having problems with what i believe might be exhaust or nothing at all but im not sure what it is...

When my car gets hott or i run it hard.. White smoke come out from under. One day i went under and saw that it had oil so i thought it just had oil and was burning it. A few times after i checked again and this time the piping on my exhause was clean and it was throwing smoke from my second cat.. I thought it was an exhaust leak but i later noticed it doesnt come out from the edges like maybe a loose screw or welding has a problem but it came from the middle were there isnt any openings idk? Do i need a new cat or something.. My check engine light isnt even on, so i doubt its an engine problem..

Can someone help..

Its embarassing cause when im at a light it smokes up and everyone stares at me

 

Make sure you don't have anything dripping on your exhaust system that is smoking. Also, if this only happens when you run the car hard you should probably change your pcv valve. If the crankcase can't vent properly at higher rpms you will get odd leaks that only happen when the block has positive pressure inside.