TTC with my best friend

So my best friend who is 31 found out a month ago that she was pregnant for her third baby and her and her husband were “not trying not too” get pregnant for atleast a year or two now. For the past 5 or 6 years, my friend and I have always had the same exact cycle. I would get my period and text her saying “ hey give it a couple hours and you’ll be getting your period”.. it was always spot on. She doesn’t know that my boyfriend and I have also been doing the “not trying not too” thing to get pregnant too. But the month before last when she would have conceived I got my period three times that month. Now this month I’m a couple days late on my period.. I’m going to wait two more days to take a pregnancy test if I still don’t get my period... it’s just crazy how your friends really do impact your life... hoping for the best ❤️