 [ Symptoms ] for 3 days now i have not been able to keep anything down sharp pains in my side headachs vomit dirrah but no fever  constant fatigue [ Disease ] most helpful answer there is definitely a chance since viable sperm can remain for nearly a week if you do not want to get pregnant you only have two choices no sexual intercourse or using an effective contraceptive method you will just need to sweat it out for a while perhaps take a few home pregnancy tests until you are sure