I have unprotected sex she is on birth control , i come no where close to ejaculating in her . she never missed a period. this period was only 2 days.

Likely not pregnant: All periods are not exactly the same. Sometimes they are short. If your partner is on birth-control pills, and she is taking them correctly, she is most likely not pregnant. The risk of pregnancy while on birth control pills is 3-5% per year. However, if she is worried, she can do a home pregnancy test and see. Best wishes!