How about forgetting honorifics all together and just using my name? Why does it matter whether I am Miss, or Mrs, or Dr or other? I only fill in this piece of information if it is required, and usually send a message afterwards asking why this is relevant.
It is a jolly good outcome of having a PhD though - almost worth the years of slog to get there :)
Love your thinking...

In the news recently, the fact many students cram for exams! Retain the information for long enough to pass that exam, then lose all memory of it in days?

Which begs the question, what are these letters after a name really worth? And why should one having such titles, believe they ought to be respected?

At the end of the day respect is something most folks would expect to earn. By the quality of their work or contributions/content of their character? And the way they relate to or help others?

I've also passed a few exams. Medicine, law, science. So what?

At the end of the day is how you use that information/qualifications and how helpful you are to others? Rather than, just puffing up a massive superiority complex?
Alan B.

"At the end of the day respect is something most folks would expect to earn"

Don't tell me that a Ph.D. isn't earned; it's hard slog, which is why I don't have one.

The Mise of Inverell.
Dear Inverell
The clan of that ilk scrioss das Sassenachs , ain dirk a' Douglas . Rainig ain bailceach . Sire , there are disputes and bad blood about your chiefly title . Some say ye have two eagle feathers in your clan cap , others demand three . The crofters are massacring and pillaging the tweeds and haggis and only your swift fist of steel will keep the clan living .

your humble and obedient sub-tenant
N

Wah wah wah wah waaaaaaaah.

A doctor who likes to give the "finger to society".

Your request for respect is denied.

I think you're right in that you shouldn't have to be referred to as 'Mrs' if you aren't married.

But I don't know why your husband wanted you in the first place when you wanted to advertise yourself as 'Ms' or that of being single, it doesn't seem like much of a commitment to the partnership or one another really, and that you chose to put other things first before you're marriage namely these 'honorifics' I'm not surprised you eventually got divorced.

But I mean no deliberate offense and wish you well, but I can't help thinking maybe you've got 'daddy issues' or something...

The others made good points and it seems like you are making too much out of nothing, but if this is important to you, and your doctorate was earned fairly for creative writing, then I won't judge.
Good luck to you.