Over planning?

I've been a sick child/ adult most of my life usually one stupid thing after another. With a trigger happy vommitting when ever I'm nauseous. My fiancé and I are getting married next June, we are trying to convince right after we get married. And since I know I'm going to most likely have problems in the long run( had one miscarriage this year) I feel like the best idea is to have a wel laid out plan. So I bought the books for being vegan and pregnant and read and found supplements and made a time line. Am I over doing it and stressing to early?