Got my degree six years ago

Got my degree six years ago, but I end up not going to take my board because, I started running a business with my partner. I recently ended things with my partner and now I’m back to school for a surgical technology, but my heart is still in diagnostic ultrasound the only thing I’m missing is taking my boards, but it has been six years. Don’t know if I should go back into it full force study from a boards or just follow through with the surgical tech program that I’m in currently and then work on passing my boards later Kind of stuck on what to do and how to move forward. Any advice would be helpful. Thank you.