Odd symptoms, I am not sure what exactly it could be?

During the past year, I have been having some odd symptoms that really have me concerned. I have tremors- my hands and legs will twitch on their own, and sometimes it's hard to write. I also get numbness in my hands and feet, and it will last for a few minutes up to an hour. I also experience some light headedness, chest pains, and some days I am really fatigued- even after a full night's sleep, I can find myself being so exhausted, I will stay in bed throughout the entire day. Lastly, I have been having some problems with pronouncing words- it is almost like I have a stutter, or I pause in between words because I can't say it right, or forget what I was going to say mid-sentence. I am a 21 year male, and I am fairly healthy. I have tried doing things such as adjusting my diet, staying away from stress, and exercising- but it really doesn't help at all. I have spoken with my doctor, but I can not get an appointment for about one month.

I am trying to get some an idea of what this could be. I understand these are a broad list of symptoms, and could be anything- but anyone who has experienced this, might have some information or advice on what to lookout for, or ask my doctor? Or even if someone knows what it might be from personal experience? Thanks!