Whoops, just realized the original post was from 2019...oh well, maybe my response will help someone 🙂
I am so sorry you're going thru this. I don't have a lot of advice on the keeping your job front, as you are in a tight spot with not having worked long enough to file for FMLA. But as far as migraine goes, I sadly have a wealth of experience, so here goes.
1) the poster who mentioned low dose Valium was 100% correct. I went thru a similar journey with vertigo in my late teens, and still have a somewhat questionable dx of Menieres disease on my chart. I also do not have hearing loss, but I do have chronic migraine, so vestibular migraine makes way more sense. However, that's neither here nor there. Point is, low dose Valium is a life saver. Works way better than meclizine.
2) as far as screens being a trigger, get your eyes checked to be sure its not something else, but often its the blue light in the screen that triggers migraines. I have been wearing BluTech lenses since 2018, and they have made my poor light sensitive eyes way happier. I used to have eyes that hurt all the time, now its just when I have a migraine. And I believe that the glasses help me to use screens more without triggering a migraine. I wear them 100% of the time.
3) Aimovig has been a life altering preventative medication for me. It is a CGRP inhibitor, and has brought my migraines from chronic daily intractable down to 2x a week. I honestly probably wouldn't have made it thru nursing school if I hadn't gotten on it as soon as it was FDA approved. There are 3 other brands as well to consider. I had previously tried like 50 other preventative meds though, and the new ones can be hard to get approved if you haven't failed other meds. It's not my favorite, but Topamax is a first line tx to prevent migraine that is often tried.
4) Try to get in to a neuro that specializes in Migraine &/or headache disorders. I like to say that migraine disease isn't "sexy" so a lot if neuros don't know jack about it. It is a complex neurological disorder that is mediated by many different factors, and it really does take an expert to navigate and treat successfully.
5) Migraines are weird. If you are having vestibular migraines, you may also be experiencing other types, and just have missed the signs, or mistook them for something else. For example, I get droopy face on the right side, slurred speech, confusion, transient aphasia, plus all the classic signs like unilateral head pain, stabbing eye pain, vision changes, nausea and vomiting, light sensitivity etc. Weird prodome symptoms like constant yawning, strange cravings, smelling burnt toast etc.
I hope that some of this info helps, and I wish you all the best!! Do you have the option of STD thru work? It doesn't necessarily protect your job, but a lot of employers will hold a job until an ee moves to LTD. I used to manage FMLA leaves for many companies, and I saw this policy a lot. ❤