What Are The Chances Of Pregnancy When Using The Pull Out Method?

Am I playing with fire? My husband and I use the pull out method. Its a method he has mastered so I am sure its effective. I have PCOS but my cycles are regular almost down to the day. Been tracking it for a year. There have been a few close calls where we thought the possibility of being pregnant was probable but my cycle started right on schedule. Over the weekend we fooled around a lot and he came all over my panties, completely soaked them and another time he came on me with only partial penetration. I am not expected to ovulate till this weekend so this happened within two days before my fertile period. I am 38 with no signs of pre-menopause. What are the chances of getting pregnant?