I was wondering what my chances of being pregnant are. we used a condom and had sex 3 days before ovulation and the day of ovulation.

Low: You said you used a condom so the chances are just slightly above zero if you used them correctly.

Low: When used properly condoms are quite effective for contraception and for std prevention. The failure rate with condoms is as high as 25%, but that is generally due to having relations without the condom "for a while", then putting on the condom before orgasm. Unfortunately for many, some viable sperm can be released before orgasm, that can result in an unwanted pregnancy.