Realistically, if you have no noticeable deficit at 7 months, or even 2, or 4, you're very much more than likely fine. However, if it were me (and do keep in mind who you're talking to as I'm not professionally trained and in the midst of this panic too), I would see a neuro at the 7 month mark. Not necessarily to have an EMG, but a clinical exam and an all-clear.
Again, I'm certain you're fine. I've related everything I know as precisely as I can. If you have no UMN symptoms now you would be the one in a billion, figuratively speaking. I don't imagine rarity means much to you, though. You're already anxious over a stupendously rare, in any one below the age of 40, disease.
Do work on your anxiety. I'll wager you notice a reduction in twitching. It's hard; so very hard, I know. Remember I'm ONLY speaking in worst/rarest/exceptional-cases and I'd advise you listen to your neurologist before a guy on the internet.
I'm definitely not trying to scare you or anyone else. Only sparing you the initial horrors, then later relief, of what you'll inevitably research. Make sure you read-over everything I've written. Not a single case in either study presented without UMN and/or EMG abnormality (positive sharp wave/denervation). And even then, even IF your EMG were abnormal, there are quite a few other things that can cause abnormalities. Cubital Syndrome, Carpel Tunnel, impingement of any variety, to name a few; most neurologists can tell the difference between these and the really nasty s**t.