What are the reasons for cramps in the left leg, left biceps, and face along with a blurry vision?

Hello doctor,

I am a 21-year-old male weighing 160 pounds and my height is 6 feet. I have been experiencing cramps or spasms in my lower left leg, my left biceps (also on the pinky and ring finger of the left hand), and in the left side of my face (precisely on the cheek and lip) at irregular intervals (approximately four to five times an hour) since yesterday. During the spasms, my muscles would contract quite hard, which was not that painful, and I was able to stretch them open with some force again. They returned to their tense position after that. On top of that, my vision also got really blurred when viewing close-distance objects. I could not read the books or anything on the phone screen till this morning. When trying to talk while having cramps or spasms, my words would be slurred.

After having two cramps that occurred quite close to each other, I decided to go to the ER, where at first a CT scan was taken, which was unremarkable (as was the MRI scan and EEG that were taken later). As far as I know, the blood test was unremarkable as well, except the first two which indicated a hemolytic condition, and they could not get any Kalium rates (at least that is what I was told).

At night the cramps worsened when I was trying to sleep but there was no tiredness. My legs were tensed all the time, and I had cramps on my arm and face as well. With my eyes open, I felt exhausted and tired, but the cramps got a bit better. I was only able to sleep after I was given a mild sedative, with which the cramps were almost gone.

The cramps dissipated today but the spasms on the face and the arm still persist from time to time. My vision seems to be normal again, although I still find it hard to concentrate over longer periods of time. Also, my balance seems to be slightly off, not dramatically, but normally I do have better balance.

The first time I experienced a milder version was six days back in the night and in the morning, at a festival, I stayed with friends over the weekend. We had lots of beer and cigarettes but did not indulge in drugs. Since the symptoms disappeared in the early afternoon that day and reappeared only yesterday, I did not think much about it.

After thinking for a long time, I could not make out any circumstantial similarities, besides a really salty and unhealthy diet on those days, in those two instances. But it seems to be getting a little bit better steadily. Since the neurologist could not diagnose anything other than the fact that it could probably be stress-related, I do not know what this could be. I would be really grateful if you could let me know what this could be.

Thank you.