Help! I am scared and confused

I got off meds approx in March, I was really feeling good, a few months ago I started feeling anxious and shortness of breath, I thought it will pass but than I started getting fluctuating blood pressure and racing pulse, which to me is very scarry, I am currently on Coreg and Benicar to control the symptoms, I was told I had Thyroiditis and Pericarditis, yesterday I spoke to my Cardiologist and he said these symtoms are not cardiac maybe I have Pericaditis but he thinks its caused by Lyme Disease, I have pain in my joints but I am not concerned about that now, my biggest concern is that my EKG is showing a change in rythm on and off, I called my LLMD but not sure when she will respond, I think I can find an EMT in the community to do a Midline, I can also get Rocephin for about $300-400 per month plus supplies, should I go ahead with this or any ideas and suggestions will be greatly appreciated,

Hi Ticker,

I do have some thryoid antibodies, Free T3 and Free T4 are within normal range, I was on Synthroid .125 and  started with the palpatations, high blood pressure and joint pain, I contacted by endo and we stopped synthroid because my TSH was .15, once I stopped my synthroid my TSH went up to 14.98, so I restarted the Synrthroid at .50, my endo at this point thinks I am having anxiety issues, my Cardiologist thinks its Lyme, can Lyme cause Pericarditis.

I was tested for Babesiosis approx 1 1/2 years ago and tested negative, what is the best test for Babesiosis?

Do you think I should just start meds till I get in to see a doctor?