Rapid arm twitching which led to body wide twitching 3 months . subjective weakness and tripping and excess saliva causing drooling which ive been told may be pregnancy normal neuro exam and reflexes . option of emg - .. worthwhile? likelihood als?

Probability of ALS is best predicted by family history. If no Family History prob VERY low. There are now genetic tests for ALS. But discuss with your Dr. first. Discuss genetic testing and EMG with team

At your age, the likelihood of ALS is minimal, and based upon your normal exam, there does not seem clinical evidence for any neuromuscular problem other than benign fasciculations. Not clear that an EMG would provide any clarification. However, in view of persistence of symptoms, a second opinion from a neurologist might be helpful.