Yes, all consistent with bfs. If I use my hand to lift something heavy, sometimes this triggers a finger to move and twitch. Same with using a muscle or sneezing, etc.
I noticed my twitching just like you did - all became worse after my initial internet search of the symptom "muscle twitch". I then became convinced I had to get life insurance to pay off our mortgage so my husband could stay home and raise my kids in the event I had a dreadful illness. After filing for the life insurance but before I got it, I broke down crying, confiding in a friend who convinced me that I was okay and basically ordered me to the doctor. This began the process of believing I was okay, and just had BFS (in my case, I saw an internist, a local neuro and a UCSF ALS specialist all who diagnosed BFS).
The long and the short of this is that what you have sounds EXACTLY like what I have and I have the official diagnosis of BFS. Go to the doctor. Put your mind at ease. You will be diagnosed with a benign condition and the pre existing thing won't even be an issue, but your peace of mind will go a long way.
Ava