I Would Like An Obs Doctor To Help Out. So

I would like an Obs doctor to help out.
So I am 27years. I have a very short mentrual cycle(19-21days). My ovulation day is so confusing because it's never the 14th day.
Counting from the last day of my periods untill monday ths week that gave me 14days and on the day I had unprotected sex with my partner now I am worried about chances of getting pregnant. I didnt take morning after pills. They make me bleed for morethan day 10days.
I am really worried ei not that the child would be a burden or something but I always wanted to plan my kids.