Sounds like classic BFS to me. I don't think ALS twitches are all over the place, and it is very rare to twitch before PROFOUND weakness. Mine started 7 months ago in my left calf. I was concerned cause it was in one spot for a long time. Now, it's probably 75% there and 25% in hands, feet, thigh, other calf . . . I also have the buzzing. It is mostly in my left leg. I have had that for YEARS with no ill effect. If you've been twitching since April, you are safe. Mine started in May, and my neuro said I would have OBVIOUS weakness by four months, six months would put me in the clear. Since I suffer from health anxiety, I probably will worry until I hit one year, but each month helps. My neuro told me I had ZERO chance of ALS, and all he did was a neuro exam!
Peg
(I am currently pregnant, but no increase in twitching. However, I do have thigh numbness and tingling in one leg.)