This is extremely normal. Congrats to you for getting to the point in which you are well enough to make this reduction in sessions. And while you are anxious about it, I do hear a lot of confidence within your post.

When I am in school I can only see my T once per week.
When I am on break between semesters, I see him twice per week. (This is what I'm doing right now).

When I have to reduce back to 1x per week, it creates tons of anxiety and disconnect. I know that situation is a little different because I'm sort of being forced to cut back sessions, where you are doing so because you and your T think you are ready! But I just wanted to tell you my example to let you know that what you are feeling is completely normal. Have you discussed your feelings about the reduction with your T? Is there a possibility of fitting in an extra session here and there if you need to?