A clear
pregnancy test after your unprotected episodes is reassuring, especially since you'd already taken emergency contraception once. Repeating emergency contraception often isn't the safest route. It can disrupt your cycle further, and that may be why your withdrawal bleed ran so long. Since your periods are already irregular, these changing dates may just be your usual pattern continuing.
Next Steps
For your trip, carrying condoms is safer than relying on repeat emergency contraception. If you want your cycle timed around a date in November, that needs planning with your gynaecologist ahead of time.
Health Tips
Please don't take another emergency pill unless there's a fresh unprotected episode this week, and do see a gynaecologist soon for a regular contraception plan.