Your last period was on 10th September and you haven't had one since. You also had intercourse between 26th September and 3rd October. This makes a
pregnancy test worth doing now, not after your trip in November.
Next Steps
Carry a home
pregnancy test kit with you so you can test any day, even while travelling. If it comes back positive, please see a gynaecologist as soon as you can rather than waiting for November.
Health Tips
The earlier a pregnancy is confirmed, the sooner you can start care that matters in the first few weeks, so please don't push this to next month.