Boyfriend finishing really fast

Breanna • 28 years old, lost my first baby 💔 12/11/17 - 1/31/18 👼 Married💍 Mama 👩‍👧

So for the past week my boyfriend finishes less than 5 minutes and he normally lasts way longer. And it's not like we haven't had sex in a long time, we have sex pretty regularly. Does anyone know why this happens? I think he's more upset about it than I am.