If you had some cervical mucous yet (slippery discharge that's lotiony, watery, or eggwhite-ish at times you weren't aroused) there's some chance of conception from DTD since it could keep any sperm alive to await ovulation. Withdrawal greatly reduces the chance of any sperm making it though. Your odds are very low after that. If it's very important you avoid conception right now and you were worried there would be time to use a morning-after pill and hormonally prevent ovulation and therefore conception.
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I think it's really worth it to study NFP, FAM, or the Billings method to know when you're fertile and when you're not so you know when to be very careful if avoiding. Counting cycle days doesn't help anything without tracking symptoms of fertility. And it's great to know when you don't have to be careful at all.