I was told by my doctor this morning that my chance of having my own kids was "not likely". How can I accept this?

I’m 18.
The one thing I really want in life is to have my own children, and be a better parent than mine were.

This morning, I had an appointment to get some things checked out not going into detail and it ended up with her telling me that I am “not likely to ever get pregnant”.

How can I accept that this is how it’s going to be? I’ve already been in a deep depression for a while now with this past week being an ultimate low and I know this is going to make things a lot worse.

I really don’t want to hear about how I’m still young.. It’s not like I wanted kids now, but in the future, definitely.
I also don’t want to hear about adopting.. It’s an option.. but it’s not the same.