Nancy, reviewing the discussion titles in the Post-COVID Recovery & COVID-19 group https://connect.mayoclinic.org/group/post-covid-recovery-covid-19/ you'll quickly see that the symptoms you're experiencing are common among long COVID patients. You're not alone.

I moved your message to this discussion so you can connect with others experiencing shortness of breath, dizziness, body weakness and heart palpitations.
- What helps post COVID shortness of breath? https://connect.mayoclinic.org/discussion/hydrochlaquid/

Here's a short list of related discussions:
- Post-Covid Racing Heartbeat? https://connect.mayoclinic.org/discussion/covid-1/
- Long COVID: What helps other than rest and more rest? https://connect.mayoclinic.org/discussion/long-covid/
- Deep Breathing & Mindfulness Class: Anyone else having success? https://connect.mayoclinic.org/discussion/deep-breathing-and-mindfulness-educational-class/
- Anyone else hitting cardio levels (on Fitbit) when doing simple tasks? https://connect.mayoclinic.org/discussion/cardio-when-doing-simple-things/

I think you might wish to add your thoughts to this helpful discussion too:
- How do You Describe Your COVID Symptoms to Your Doctor? https://connect.mayoclinic.org/discussion/describing-your-symptoms/
Do you find it hard to describe your symptoms to others?