Can i get pregnant if i take the cum inside the condom put it in a kid syringe and stick it inside my obvulation was the 18th ?

Yes: It is possible to get pregnant this way, if live sperm are taken and inserted into the vagina.

It's possible.: Depends on whether the sperm are still functional. They don't live long outside of a person. Inside a woman's body, they can live for up to 5 days.

Yes ...but: You would need to do so rather quickly. You may want to consider the outcome of your actions too. If your married you may need to find a lawyer to handle your divorce if your husband is/was not ready for or willing to get you pregnant. If not married there are still legal consequences to using someone's sperm without consent.