I've thought a lot about what you wrote. In our current situation, in the absence of orders or a supervising doctor...just because we CAN doesn't mean we SHOULD. Three times a fire captain rolled his eyes at me in my last district because I chose to call him because I was out of options. All three times I was right (mental health crisis in a student, chest pain in a woman that he completely disregarded until I said "Do you at least want to put some leads on her before you tell her she's not having a heart attack," and what turned out to be a new-onset anaphyactic reaction to a bee sting in an adult).
It doesn't matter. We are the front line and the backup and there is zero shame in realizing we need more equipment, some orders, or transport. Essentially I have my super-tuned assessment skills, an AED, orders for an EpiPen for anyone with a new onset anaphylactic reaction, and ice. I have a handful of doctors' orders for emergency meds, and all those come with an EMS call.
Every time something like this happens we learn from it. I'm glad you asked the question.