Wow! I'm sure glad that you are okay!!
While I'm not sure what all you have been taking, I do know that 1st degree AV block can be related to Lyme disease:
emedicine.medscape.com/article/161829-clinicalwww.ncbi.nlm.nih.gov/pmc/articles/PMC2908662//www.rimed.org/medhealthri/2010-11/2010-11-339.pdfwww.webmd.com/a-to-z-guides/heart-block-topic-overviewwww.pediatricsconsultant360.com/content/case-point-heart-block-presenting-symptom-lyme-disease There are a lot more articles on this. All I did was search for "First degree AV block, Lyme disease"
I do hope that you get this figured out quickly!!