6 days ago the ring finger on my left arm (jab arm) started going numb and tingly while still being fully functional. I also started having a lot of trouble breathing (my breathing has been going to shit for a couple of years, but it got really bad around that time). Now it seems that my middle and little fingers are going numb as well. It gets even worse when I'm lying down with my arms bent.
Could it be just a pinched nerve or am I going to die of fucking pericarditis?