Thank you for asking your query at DoctorSpring.
Yes, the chance of pregnancy is very less as you has sex on Day 8 and since there was no complete ejaculation. However t be 100% sure I recommend a emergency contraceptive pill like "iPill". This needs to be taken only once. But please make sure you are taking it within 72 hours. You can get in from any medical shop.
If future always use condoms for safe sex.
Hope this helps
Please feel free to ask followup questions.
Patient replied :
will there would be any side effects in future by taking i-pill
iPill is generally safe and well tolerated.