What you are feeling is totally normal. The best advise I can give you is "When nothing is certain, anything is possible"
Those words may not seem like much but if you sit & reflect on them for a while you'll realize how powerful they are. We spend so much time trying to control & plan everything that happens and goes on in our lives but if we relax and let life happen how it's supposed to then everything will work out. Don't stress about the unknown & enjoy the journey of becoming a new.
Good luck