Uneducated sex Ed

Okay so for those who have a better knowledge than me lol so I’ve been with the same guy for five years now and we have a pretty serious yet loving and relaxed relationship. We have the mind set that yes we are young so it would be better to wait to have kids but if it happens it happens.

So I’ve always had and irregular period, I have PCOS and I have a bad memory so some times I forget to take my birth control. So if my boyfriend came inside of me following the above factors. Should I be concerned or just like keep an eye out for anything ? This happened on August 17th. My period won’t start until September 3rd. Any suggestions/advice?