Unfortunately, that's not how questions are usually structured in English. What did I have? (Verb did after the question word What/When/How etc) OR and I think this isn't common anymore "What had I got?" (Past tense version of What have I got?)
Präteritum does not equal Past perfect in English. I am not a native English, but to me it sounds quite clumsy to use past perfect without any additional markers. Still if you believe your option is OK, you should report next time.