That just sounds like you get too much iron from the pill.

But no, this is still the job of a dietician not a doctor. A GP could give you your bloodwork and send you to a dietician with that. You don’t need a medical degree to be a dietician. It’s simply not the same job.

(Also spinach is not considered a good iron source because of the low bioavailability of the iron in it. The best sources are mostly animals. If you are vegan it’s probably a good idea to supplement, just like Omega-3)