Wish I could see the happy ever after

I wish I could see the happy ever after me and my transmasculine genderqueer partner but, the truth is, I am terrified. I can't imagine us having a family without thinking about my fertility options (pretty much limited to a non-related sperm donor based on conversations with my partner) if I want to have a biological baby of my own (which I do). I can't imagine a future where my partner has transitioned so far along (currently at 5 months) that they're not recognisably trans* any more and we're viewed as a heterosexual couple by strangers. I can't imagine whether top surgery will fix my partner's world or whether dysphoria will claim other parts of their body and we will have more years of wait times and appointments and surgery and recovery. I can't imagine a future in which all of this has happened to us and my partner has got to such a good point in their life that they've been able to focus on themself and their career goals and their dreams and we've started to build a world we're both proud of. The constantly changing flow of transition feels like everything is fluid and temporary, and what if I am too? What if we don't make it? I love them more than anything in the world right now and I can't bear the fact that there's no guarantees with any of this and so much is unknown.