By the sounds of it, you are in the exact mental state I was in just over 11 days ago. I had twitching in my arm, googled it, and immediately felt "weakness" in my arm. What I didn't yet know was that the weakness associated with ALS is clinical weakness, meaning you don't feel weak, you are weak. For example, you can't pick up a hair dryer. Or walk on your toes, or turn a door knob. Take it from someone who was in your shoes just says before you! You're fine! We're fine! I'm a 16 year old male. You're a 19 year old female. Forget the fact that ALS is a rare disease in the first place. But to get it at our age, we'd be one of the only cases ever in this age range. Think rationally. You'll be fine. Do not google ALS or anything else, and don't google your symptoms either. Dr. Google will take symptoms of someone who has the common cold and make you believe you have cancer.
Bottom line: your symptoms are not even ALS symptoms. Carry on as you were before you knew about this disease.