Due to the vacuum of space, there will be formation of bubbles in your body fluids within short time & you’d swell up pretty bad- up to twice your normal size!
After 15 seconds, your body would’ve used all of the oxygen and you’d lose consciousness.
After some time, your lungs would rupture & might even explode. Your skin would burn due to the harmful UV radiation coming from the Sun. Since outer space is extremely cold, your body would gradually freeze.