Health anxiety is terrible today

Hi M20 here and recently I’ve been dealing with dizziness, fatigue and slight nausea. I’ve been getting better at dealing with and trying to rationalize it to anxiety but my symptoms have been so bad recently I feel like I’m dying. Just today what’s triggered it is I was on a train and I was leaning on my arm and all of a sudden it felt dead really quickly and much more than if I was leaning on it before and I’m so scared I have something wrong with my blood circulation as my arms just feel really weird and tingly. The blood does feel like it has returned and I have more feeling there now but it still feels weird. I just wanted to know if anyone else got pins and needles in their arms and tingly sensations as I’m so scared right now something is going to happen. Especially with my constant slight dizziness that I just feel like I have some underlying problem and I really want to go to ER but I just know it’ll be a waste of time because every other time I go they say I present fine. Sorry this is written so sporadically but I just feel so scared especially since I’ve been feeling occasional pain in my arms and all day I’ve just felt “off”