What do you do about fleas?

[OddFamily]

I think my mom has acquired some fleas from my grandmother.  Every time (and I do mean every time) I say I'm thinking about doing x, y, or z, her first instinct is to jump on it and poke holes in it.  She does the same thing with my dad too, so it's not just me.  I say "I'm going to ask my PCP for advanced directive information".  Note, simply asking for information, not signing anything.  She completely flips "Don't sign anything, you don't understand what you're signing" etc.  The same thing happened when I mentioned I had asked for information on joining our state's medical reserve corps.  Flips out "How are you going to work that with your job, they're going to have you do things you're not qualified for" etc.  No, and no.  All assignments are voluntary, and you are expected to refuse assignments outside of your scope of practice and I know where those lines are.  She did the same thing when I took a temp job that had great chances of going permanent and would get me out of a toxic job fast "You're making a mistake, how do you know they'll offer you something permanent, you'll get bored doing it, it's not using your skills" etc.   
I keep saying you're jumping to conclusions, but it doesn't seem to be getting through.  Makes me wonder why I bother telling her anything.  I've been an adult for 10 plus years, manage my own household as small as it is, go to a good job, pay all my own bills, never in any sort of trouble, and yet I still get treated like a child.  I'm thinking an information diet or presenting things as a fait accompli, but there are times I would value her input.  How can I balance this?

[WinterStar]

I keep saying you're jumping to conclusions, but it doesn't seem to be getting through.

You can't get through. You can't make her get it. She would have to do the hard work of realizing there's a problem and then deal with it. I certainly hope that happens for her and for you, but there's nothing you can do to make it happen.

My mom used to do similar things. Every time I had a dream or something that I really cared about, she would criticize. I remember telling her I dreamed of being a foreign news correspondent. So she sent me an article on how many female news correspondents are violated and killed each year. Thanks mom!

I have spent decades trying to figure out the perfect thing to say so my mom will get things. I'm still doing it. At least now I know I shouldn't be doing it and have stopped trying to reason with her. I am trying to let go of the deep desire to help her make progress. Which is just so backwards, btw. She's the parent, not me.

[OddFamily]

Thanks Winterstar.  I get it to some extent, she lost a child so she's super protective of me.  However it feels like every few weeks we're having the same conversation:  Mom, I am an adult, but out.  Ok, I will, and nothing changes.  I read somewhere else (one of the professional journals for my field) that if someone says yes and nothing changes that it's really a no, so I guess I need to see this as a no and put her on an information diet.  Or only share something with her if I want her to pick it apart. 
I've been doing what is in my best interest. 
I did have that discussion with my PCP. 
I did get out of a toxic work environment that she said was bad for me and I agreed, we disagreed on how to get out of it.  So much happier and in a few weeks start the going permanent conversation with my manager.
I did sign up for state medical reserve corps but I haven't told anyone in the family yet, I finished my basic training and forms, now it's just a matter of waiting for everything to process, my gear to arrive, and get my first deployment.  Most likely doing vaccine clinic administrative support in conjunction with the health dept. or local hospitals, well within my scope of practice.  I can't give vaccines, but I can sign people in and out, file the paperwork, schedule appointments, direct traffic, disinfect areas, and so on.