Hello again RJ
Twitching can occur anywhere there is muscle and you have lots of muscles in your face. Given the fact that your twitching is more or less global and sounds like it occurred in a very short period . . . AND . . . after all of this time you have no signs of weaknes, it is most likely benign. Keep an eye on things and if you start to have weakness or other symptoms, then call your neuro. Also, for your peace of mind, have your neuro do another EMG in 3 or 4 months.
As far as the "lump in your throat" feeling: bluebottle is right in that it can be caused by anxiety. There are lots of muscles involved in swallowing, one of which is the cricopharyngeal muscle. If it spasms (and this can be caused by anxiety and a number of other things) it will cause the pharynx (part of the tubing that leads into your esophagus) to get smaller and cause the "lump in the throat" feeling. It is called cricopharyneal spasm and the condition is known as globus pharyngeus. It will most likely resolve on its own and can take up to months. Of course, if it doesn't go away or gets worse, then you want to contact your doc. He already told you to keep an eye on it, so it's good he is already aware of it.
Can you get atrophy of the face: yes you can but again, I bet what you're seeing has always been there. As I said above, just keep an eye on things and look for progression or change.
Can you get bulbar and limb onset at the same time: there have been documented reports of such a thing happening . . . BUT . . . it is INCREDIBLY rare. I have many journal articles that show ALS starts focally and then spreads radially. As always, there are exceptions, but those exceptions are once again rare, so global weakness in all of your limbs as well as bulbar problems is not typical ALS.
You seem to be on top of things as are the docs you are seeing, so listen to what they say and keep them informed as to what is happening to you, both physically and mentally.