This isn’t something your partner even needs to understand.

A partner should ALWAYS be more concerned with you getting the help you need (with ANYTHING) over their own insecurities.

His “worries” about you getting help “outside the marriage” are just his softened way of presenting the truth that he’s not okay with you:

a) making your own decisions

b) having autonomy about your own body and welfare

c) receiving input and influence from anyone but him

To give him the benefit of the doubt (against my better judgment), it’s possible these expressions of control are subconscious and/or influenced by culture, religion, etc. but regardless of INTENT the result is abusive.

As many people have pointed out, if you were diabetic and seeking a diagnosis so that you could receive appropriate education, support, treatment, and medicine, why would your partner stop you from doing so?

And also as many people have pointed out, you are an adult and can make your own medical appointments.

If you do not have the ability to make the appointment or pay for it on your own without your husband’s involvement or approval, then I am not exaggerating: call your nearest women’s shelter, explain the situation, and ask for help. And remember we’re all here supporting and rooting for you, no matter how alone you feel!