My boyfriend ejacuated outside my vagina. We did not have sex. I cleaned myself after he ejacuated and took a shower. Is it possible to get pregnant? Should I take the morning after pill

Are you saying he pulled out? ANY time there is penile insertion there is the possibility of pregnancy. You can reduce the possibility but not eliminate it. The pull out method is one of the least effective. Any time semen comes in contact with the vagina, there is also a possibility. A very small one, but it exists.

The morning after pill is an emergency measure. If you are going to be sexually active, then you should prepare by using more effective means of birth control.