Fertile now? Irregular period

I know apps are just guessing games really when it comes to when youre ovulating, but at least it can somewhat guide women i guess

My period can be very irregular. When i input my period info on this app it tells me im fertile now, and in another app it says i wont be until the 10th

Today my partner came inside of me and tomorrow we will have unprotected sex again

My period was

May 13-16

April 1-6

No period march

Feb 10-13

No period january

Dec 23-26

Unprotected sex can always lead to pregnancy. Am i most likely fertile now or more so on the 10th?

I havent gotten a store ovulation test because we arent trying but we also arent not trying. We would both be happy to have a child together if it were to happen. Im just wondering if im actually in my fertile window

Thoughts? Thank you