I had unprotected sex for 1 minute. how likely is it that i could be pregnant? didn't even come close to coming

Your partner did?: You may not have reached climax, but your partner may have and his ejaculate contains sperm, thus chance of pregnancy to you regardless of your own climax status--it is not fair, i hear you. If you miss/late for period, consider checking a pregnancy test. Also, checking for std is advised. If you have other concern, consult doc. Good luck.