When Can Sexual Intercourse Be Performed After Undergoing Hysterectomy?

i just had a hysterectomy done on April 25Th 2011. my boyfriend n i had sex after a week and a half. He even left his semen in me. Now im very worry about the consequences that other women went thru after sex too early. what should i do? please tell me because i worry about it day n night. i cant get that offf my mind. I feel mad at my boyfriend for his horniness.