It's Pregnancy No.3' for Brittany Mahomes as she shows off her growing baby bump cutely to her friends

“No, I did not expect this at this point in my life but everything happens for a reason!” That’s Brittany — Patrick Mahomes’wife — getting pretty candid about her third pregnancy … revealing the two weren’t planning on having kids yet but they consider it “the biggest blessing [they’ll] ever have!”

Matthews — a fitness pro who’s been dating the KC Chiefs QB since high school — when she found out she was preggers … and almost didn’t realize it at first! “It’s funny because I read the pregnancy test wrong at the beginning and I thought I was all good to go — ready to party, Then, I had a weird feeling and I went back and checked just to make sure and it said positive.”

Brit admits she “freaked out” — but notes Hubby Patrick was “just so sweet and supportive” and “things have just been great .” No, they weren’t “trying” to get pregnant — but Brit says they weren’t exactly “being careful either.”