There is still some chance of pregnancy even without full ejaculation, since pre-ejaculatory fluid can carry sperm. Given it's already been a few days since 29 September, waiting for your period date is the clearest way to know one way or the other.
Next Steps
If you want to lower the risk now, emergency contraception works best within the first three days, so speak to a pharmacist or gynaecologist about it today. If your period doesn't arrive by the expected date, take a home urine
pregnancy test.
Health Tips
Don't rely on no ejaculation alone to rule out pregnancy. See a gynaecologist if your period is delayed by more than a week.