How likely is it that I will want to switch my major?
Psychology (especially children's psychology) is going to help you immensely in Childhood Education, which is an industry that is always going to have jobs.
And then when it comes to Creative Writing - that is something that you can practice and hone your skill at yourself by writing everyday and reading a lot of what you want to write.
I would suggest you combine formal Psychology studies with a vocational Childhood Education certificate and pursue your hobby of writing on the side. And not only will the psychology help with childcare, but it will definitely help you craft interesting characters with depth!
Hope this helps - my wife works in childcare and I studied Creative Writing in University and I devoured Paul Bloom's psychology lectures on youtube
I think that an option you might ponder.
Students who have a passion for writing will find the opportunity to develop skills in a range of genres, as well as nurture their capacity for creativity, applying a psychological frame to several areas of writing, such as autobiography and biography, poetry, drama, fiction, writing therapy and community writing:
Another option can be Grafology:
Graphology is a projective technique which objective is the study of personality traits of individuals through the interpretation of the so called graphic aspects of handwriting. Some people call it the “psychology of writing.”
Graphology is a tool to know ourselves and who surround us. Graphological analysis has several applications. The possibility to get to know people in depth through a method that is apparently so simple, such as the analysis of the characteristics of handwriting, gives graphology the opportunity of being used in many fields of knowledge.
In the field of psychology, graphology is a test of personality and a deep investigation of the human being. It contributes to patient diagnosis, to the identification of the typology and alterations of personality.
The analysis of modifications that writing suffers along a treatment, allows to know the evolution of a patient, given that graphical symbols change their aspect for the same individual, along with the evolution of their psychism.
Working with Children:
In education, although teachers teach children to write according to a calligraphic model, it is observed that not all students write the same way. Each person writes with a type of handwriting of their own and directly connected to their personality. Graphology contributes to know students in their different areas of their personality, their temper, and their hidden psychological complexes, which allow to understand the reason for their academic performance and behavior.
It also helps verify progress and regression of each student through the systematic study of writing and to detect situations of risk.
Through graphotherapy, which is a graphical psychotherapy treatment and also an invaluable tool that educational psychologists count on, different aspects are treated which are related to children with difficulties in paying attention, dysgraphia, social behavior disorders such as shyness, isolation, aggressiveness and affective disorders, among others. It is possible to modify the negative traits through proper graphical exercises meant for correction.
These may be the solution to many small personality conflicts. This is also applied to vocational and professional orientation, gathering the skills of the students. The high cost and great negative impact of deficient hiring processes, promote the acquiring of graphological analysis to personnel-selection processes.
I wish you luck in your decision!