So very sorry for your symptoms. Testing can be unreliable it is good you are going to test at Igenix.
Yes many here have had those symptoms. I had heart palpitations , air hunger ,internal vibrations and many more symptoms.
I have read posts here of others having the racing heart. Some have P.O.T.S
The air hunger(shortness of breath) may be babesia. There are many other infections that ticks and bugs carry.
You can also search here for an llmd while you wait for member responses: https://www.ilads.org/patient-care/provider-search/
If your willing to travel to The U.S.A. there are top llmd,s here that members can give you recommendations for in the Washington D.C. area
I will bump up this post for more views.
Please keep checking back for response as we do have members in Canada that may have recommendations for you.
Take care and I wish you the best of healing.