I was wondering if your job or your employer offered a healthcare package? I wouldn’t ship insulin overseas as
@helensaramay said it’ll be leading to fraud. Also it is troublesome to ship insulin due to environment and weather. Our prescriptions are for UK residence. I’d look into health insurance to cover endo, doctor and prescriptions. EHIC would cover some prescriptions and doctors but you need a long term solution because you do need to see a consultant or more specialist help for diabetes.
I heard it’s not too expensive to buy insulin at the pharmacy. I had to pay €40 in the netherlands for novorapid. I can’t comment prices for Spain.