Hi to every body !!!

I having trouble to start my car this morning . * after turn the key on and wait for fuel pump stop runing . start the car , it run for about 3 second and shut off by itself .I turn off the key and try to restart ,it does not start . after about 5 to 7 try it start up and run very slugged. after 10 second it clear out and run fine . ( in between crank , exhaust having rotten egg smell )any body having any idea . I'm worry .