Doctors? What About Ejaculating Inside Me...?

I'm a 25 year old female, just married this year. I've been on the depo shot for 3 plus years now. Before we married we used condoms and also practiced withdrawl. I'm extremely paranoid about getting pregnant for my career and my hobbies. We've been having intercourse without condoms for almost about six months now, but we're still practicing withdrawl. Is it safe for him to ejaculate inside me during intercourse? What if my husband were to ejaculate inside me on a weekly basis? I've been on depo for quite a while now consistently. Are the risks still too high for him to ejaculate inside me or are we ok to do this?

Susan