When am I due? confusing! Sorry :(?

Regardless of how long your cycle was, you still need to go back to when your last menstrual period was, and go by that. Whenever that was, add nine months and 7 days that will give you your due date. Your OBGYN will go by your last period no matter what and even if you have late ovulation or short/long luteal phase, if your dates need to be adjusted by ultrasound they can do so accordingly.