Males sometimes do not express HAE until their testosterone starts to fall.

Mine went undiagnosed for my whole life because I have mostly gastrointestinal HAE....with only minor swelling attacks. It was the use of a blood pressure medication, and my own falling little testosterone (that women have), that pushed me into a crisis.

The drug induced lupus does not have elevated ANAs.... either.

So look at your medications, also.

The complement results for HAE are complicated, and the websites for it explain the various types. So it would be worth it to rule this out.