Boyfriend prank backfired 👊🏼

So my bf of two years and best friend of 2 1/2 years and I have recently began having sex. Before that we discussed what would happen if we were to break up,get pregnant, etc.

I always thought it would be funny to prank him about being pregnant.I started to talk about having kids (which is normal in our relationship) and what he would do if I was pregnant and such to get him suspicious. Eventually he said “is there anything you want to tell me”and after beating around the bush I cane out and said “We’re having a baby” I waited for his response and he started laughing and he’s just said “ yeah right you got your period these past two months” and I felt defeated. 😂😂