Don't like my choice of grad program and don't know what to do
It sounds like you do not have the passion for the study you are in - and this will invariably affect your effectiveness to be able to succeed in the Masters you are doing.  At 26 years old, rather than being 'too late' to try anything new, take this as an opportunity to explore new fields, to find where your passions are and most of all, find a path that you will both enjoy and feel fulfilled by.

The ultimate decision is yours; however, a few things to consider:


Just because the course is perceived as being "the thing to do", does not mean it is the best thing for you to do.  
Consider if that field is a career that you want to devote your time to in a career.
Is there chances for innovative new research in a related field?