Sustainable career? Questioning my decision

I’m a new ultrasound tech and started my first job at a clinic first week of July so it’s been about 5 months of scanning. I’m only at half the patient load as other sonographers here ~7 patients a day and im already starting to get upper back pain (near my shoulder blade), forearm and SCM muscle tension.

I’m wondering if this is feasible as a long term career since I feel like I’m going to break my body. Some of my colleagues have been scanning under 3 years and have already been injured.

I think sonography is cool in general (especially Ob is fun) but I am not super passionate about it either. For me, it’s just an interesting job. In all honesty, I am considering leaving the healthcare field entirely. It feels like a lot of work and stress for not enough pay. It’s just difficult for me to bite the bullet since I feel like I’ve spent so many resources invested in this field (4 years undergrad + 2 years for ultrasound). I’ve also never found a true career passion so I’m not sure what else I want to do which also makes it hard to make a switch.

Any experiences, advice, or guidance is welcomed. Forever feeling stressed in a quarter life crisis state.