Ok so I've been smoking weed for about 4 years and was a huuuuuuuge stoner and smoked weed all day everyday. But now all of a sudden I get these weird panic attacks and have been getting them for the past I dunno 6 months only when I smoke weed. Well actually at first when I started getting a discomfort in my chest I ignored it and kept blazing then it got worse and I got really bad chest pains, my left arm would go numb, then even when I wasn't stoned I'd get chest pains and have gotten tested like 5 times for heart problems or anything and the doctors can't tell me anything. I took maybe 3 hits from my pipe last night wasn't even stoned and within five minutes I started panicking like my heart was racing and my left arm started jolting in radiating pain.. I dunno why all of a sudden I get panic attacks when I toke up and how to prevent or stop them ...? If anyone has experienced this or knows how to stop these or any advice please help.