You may have damaged the engine, perhaps just suffed a piston. There are many variables that could cause a bit of oil smoke from valve guides/stem seals to worn rings, damaged rings or damaged piston.
To start the process of elimination I would suggest a compression test followed by a leak-down test to see if the piston/ring and valve seats are healthy.
IF a piston is damaged it should show shitloads of blow-by (lift the oil cap while the engine is running).