I have a slew of medical issues that I have to contend with while PG, too (already been referred to MFM, a bunch of other specialists on my speed dial, etc). The way I'm coping is by just looking one step ahead. When is my next appointment? Who is it with? Do I need to bring anything with me? Etc.
If I let myself, I'd start to worry if/where my child will go to college, or if/when will they get married, etc.