Regret would be not riding
Sorry to hear your story, I hope that you have found a shop that listens to you and gets you on the right size.
It sounds like you know what size you need - so push those regretful/burned feelings aside and get what you want. That is to say, get what you deserve - a great fitting bike, fun and happiness. :D
That was the advice I gave to the 3-4 ladies I encountered over several years in a shop, who, like you, struggled with fit on a bike that was just too big. There was one lady who had bought the bike at another store, came to me for a fit (recommended by a mutual friend) but I had to tell her to take it back for the next size down.
If there are ladies that you know who recommend one shop or fitter over another, that would help too.