I recently noticed I've become a little dizzier/lightheaded as of late particularly on one side whenever I walk and that my left leg feels a little awkward, I've also noticed my two ring and middle fingers have become weak though someone just told me it was because I constantly strain my fingers while typing/scrolling on a laptop; I've done all these strength tests but the other sensations, not severe, are there. I also, noticed I have lost that urge to have a bowel movement even though I eat right and drink somewhat, physical activity is at a minimum.
Previousy before all this my daily routine did a 180: I shut down (quit working out /being active) and ate and drank horribly but I was fine, now 3 months later I'm experiencing all this making me think I have some type of MND or ALS, could my body be in shock from the change + the added stress and anxiety? I'm only 19 and something like this would be upsetting.

Note: I've already been to a GP who said stress/anxiety, the ER twice for Acute renal failure and cancer both said it was stress, and another Dr. that said stress, but I wasn't feeling dizzy/lightheaded then and all bloodwork 10 vials in 2 days came back normal. I can't schedule any appointments as I do not have insurance to, so what should I do? this is really eating at me.