You have found yourself in a difficult spot having to deal with the issues of your work and money and then her response and feelings.
In a committed relationship couples stick together thoughts the good and the bad times.
If the situation is overwhelming her she will need to deal with her own dissatisfaction about her own jobs and then will need to address the situation as a couple with what is going on with the relationship.
There is couple's counseling available if either of you has behavioral health insurance.
This is something that has to be dealt with. Lots of people want an easy ride in a relationship where things are all beautiful and problems free. That is not a realistic expectations. The two of you will have to sort priorities out. Anything is temporary even the lack of money and better work. Humps in the relationships are temporary too but need to be dealt with.