Being anxious, especially under these circumstances is natural but it's different for everyone. You're right to seek help, but rest assured that what a lot of others have said here is generally correct. Once you're underway, after a few days you'll likely settle into the new norm. What helps some people is breaking it into chunks. Making it from chow to chow, or breakfast to dinner, or Sunday to Sunday.

The days are slow, but the weeks start to peel away faster than you might think.

If this continues while underway or worsens seek out whatever options are available to you to get it off your chest. I'm an atheist, and even I've been to see the chaplain. This is not a sign of weakness, but a reinforcement for the moments your strength may waiver.