Please help - Adrenaline spikes and other things

I am looking for support or possible similar experiences, as I am tired of being told this is in my head/just anxiety. For almost 2 weeks, I wake up very early in the morning with an overwhelming amount of what I think is adrenaline - Racing heart, diarrhea and often nausea/vomiting, muscles twitches, etc. Sleeping has become close to impossible, despite incredible fatigue. During the day I have frequent thirst but also frequent urination. I also have decreased appetite. I was treated over a week ago for low potassium and put on a high potassium diet, which has been difficult due to gastrointestinal issues but last potassium test (yesterday 5/8) came back fine so all these bananas are doing something. EKG was normal aside from shortened PR interval, for which I was already referred to Cardiology (who I see on May 16th). I did a week long cardiac event monitor in early April which picked up lots of low burden PVCs and one episode of Atrial Tachycardia (222 bpm lasting about 21 seconds). My heart rate is much higher upon standing but no drop in BP that I’m aware of (in fact, I think my BP increases). Have a hard time regulating my temp so I’m often shaking. Worst of all, everything is affecting my mood. Before this, I was a busy active mom who always jumped at a chance to volunteer at my daughters school, even coaching the girls running practice for a 5k at the end of this month. Now I feel incredibly burdensome. My partner has been tremendously helpful through everything but I hate that the weight has been placed on him when he already does so much. I don’t know how to get through this. I’m so tired and afraid that I’ll never get answers and/or never improve.