Sometimes if you hover over text that Word has autocorrected, you'll see a little autocorrect icon that will turn into a drop down menu. If you can find that, it will allow you to undo the autocorrect without undoing anything else (and you can do it kind of any time, maybe until you save the document?).
You might also try doing a Google search for how to turn off that feature, just to see if anyone else has run into your specific problem and been able to fix it. I have a lot of success with that method for figuring out how to do things in Office...just make sure you include the program and its version as part of the search. You may need to refine your search terms a few times, but there are a lot of helpful sites out there.
To go back to the main topic, I really wish my mom would stop "helping" my husband find a job. He's an academic who just graduated, and the market is tough. Plus, we do actually have some restrictions on what he's willing to do (mostly to make it worth moving), so that limits his options a bit as well. My mom's version of "help" is to tell me to tell my husband that he should look into other fields (without offering any suggestions). Or that someone else she knows is a person who knows lots of things, so surely my husband (who also knows lots of things) could do something in that other person's field. Nevermind that the other person's field a) requires a degree my husband doesn't have or want, and b) is as difficult to get into as academia.
I know my mom's advice is coming from a place of love and caring, but good gracious I am tired of it. Especially because if I actually ask her to stop telling me these things, she'll tell me she's only trying to be helpful. If I tell her why her "help" isn't actually helpful, she'll tell me I'm just being too negative and she's only trying to help.
I just comfort myself with the fact that at least she's telling it all to me (rather than my husband), because it bothers him more and I can just not tell him about it. It helps to think I'm taking one for the team when I smile and nod and change the subject, rather than telling my mom that enough is enough.