Oral sex, insertion for few seconds, during ovulation phase, pregnancy chances ?

My husband and I are usually careful,(using condoms of avoiding during ovulation) but last week we weren t and now I am wondering if I am pregnant . 1. I m 40 and we are the parents of 3. 2. We had oral sex and then an hour later started fooling around again. 3. His penis was dry (no pre ejaculation ) and he inserted for 3-5 seconds....2-3 thrusts) 4. He did not urinate in between sessions to wash out urethra 5. I might have been ovulating, but if so was on the last day of my ovulation. I usuallly get a white film on my vagina when ovulating. Didn t have this. 6. I urinated when done... 7. Chance I could be pregnant from this episode?