Why was Bella Cullen (B. Swan) having those dreams about a boy?

I don't remember quite well because I've only read the 图书 once and i havent watched the movies..
but Bella was having dreams of a baby boy and all...
while doing math my thoughts wandered and i remembered how Renesme could 显示 visions and all..
so the dreams, were they caused 由 renesme.. well no maybe not..
but what was the whole point of them? so that she could think Nessie is a baby boy? and call him edward jacob junior (which tbvh im glad she isnt)? i mean it can't only be so she could find out she's pregnant..

i think im over thinking... maybe xD

I'm really curious, maybe the 作者 was trying to tell us som- OH GOSH IM TURNING INTO MY ENGLISH TEACHER

someone just answer this...