gender jealousy

so my SIL is also pregnant, due in August. today she found out she is having a girl and ever since she told me i was so down, and i dont know why.

i still dont know gender of my baby.

i have one boy, and ever since finding out im pregnant again i kept saying that i dont care about the gender, and i even think im having a boy again.

so why did this threw me off? pregnancy hormones or jealousy?