You don't have to let your different backgrounds and life style get to you. It will only undermine your differences if you let them. People get married from different backgrounds, faiths, and personalities. She is just a different phase in her life than you. That doesn't have to be a problem. I think you are anxious because of this but it's okay to be in different phases. If you are compatible then that shouldn't matter. Find things to do while she is having meetings so that you aren't so focused about what she is doing. If her job is stressful she is going to need support even more. If you are happy focus on the relationship rather than the differences.
If this was helpful press accept