Confused & Overwhelmed

What a wise son you have. Its always a good parenting moment when your kids come out with a wise comment. A credit to you. I'd be getting as far away from HRT as possible. For all you, your body has gone through it all and when you stop, you may not notice. 
With regard to the diseases you mentioned, as women we all get older and most don't develop these conditions otherwise we would all decline after 50!
 Our bodies know what to do when it treated well. 
Keep us posted on your surgery and treatment.