Talk to Heart - Cardiology on Abnormally Fast Heart Rate And Beats In Head

hi ! kindly read the whole thing . i am 25 years old . young and athletic .. around 6 months ago i had constipation issue at that time and one day it caused some bleeding from my rectum it was fresh blood but it was just one time thing didnt happened again . but right after that bleeding i got a sudden allergic reaction in my body . it was like the blood vessels in my skin will brust out with blood . my eyes got all red my face hands stomach back filled with some red spots and i was not abe to stand up . it increased while i was standing and got a bit normal while i layed down . well after that i was rushed into emergency and they said your bp is low and they gave me some Drip but after that drip my body got swelled up for 4 to 5 days . the swelling got better after 5 days but i felt light headed and my mouth was having bitter taste all the time .. i consulted medical specialist . he said my heart rate is a bit faster . i had harmonal tests blood tests ecg Mri and many other tests but