Does anybody have any advice, or have ever been in the same situation?
I didn't read any of the replies so sorry if this is repeated.
I would strongly urge you to finish your degree. It will never be easier to get one than right now. If you give it up, you mght never be able to get back in this position. On the contrary, medic school is always available, isn't as expensive, and doesn't take as much time. You could easily do medic school while working, not the same for BS. Yes you can get a BS while working, but not easily.
In my experience, EMS is a great job, but not a great career. Advancement is limited, salary is limited, and you are one back-injury away from having no career. What will you have to fall back on? A BS in chemistry or nothing at all? You may even learn, after a few years on the truck, that you want to go back to school, to be an RN, PA, or MD/DO. Without your degree, you will now have to go back to school to get it, while working, going to class part time, it might take 6 years to get your prereqs, all while paying per credit as a non-traditional student. You might only be able to take classes at a community college, and won't be accepted on your application because they aren't "university level". On the other hand, with your chem degree, you will not only have the degree and preregs, you have a firm grasp on the basics of physiology and pharmacology, which would set you up to be a great doc, PA, or even a great medic, if that is what you choose to be.
Medic school will always be available, but getting a BS gets harder as you get older.