how to deal with parents who are indifferent about/ignore your pregnancy

So my parents had me and my siblings very young and now that we're grown they have had midlife crisis and move 2,000 miles away. I am 25 yo, married and have a stable job. 
I let them know about the pending arrival and they literally couldn't care less. I'm terrified to not have their support and have no clue how to handle this. 
I feel like they will regret their response/lack of response once the baby arrives. Has anyone else had this type of experience??