Weed caused panic attack and messed my life, symptoms wont go away.

Smoking weed & had a panic attack now my health is all messed up.?About 4 years ago I started smoking weed vary lightly I was taking baby steps. And after about a month of smoking weed I hung out with some buddies and smoked a little too much and had a panic attack. Heart felt like it was going to beat out my chest the smoke from the weedd went straight to my head from my lungs, got really dizzy and couldn't even walked and next thing you know I was on the ground. I was really high obviously. I was rushed to the ER and they already knew what my situation was. After I calmed down they released me. Every since that night I have had heart problems. My heart beat is very strong, I have shortness of breath a lot, I get heart palpitations often I suffer from anxiety now, I suffer from fatigue everyday and I cant sleep no longer than 5 hours a night. What is going on?? Anybody with this same problem can you help me get my life back. This has been 4 years and every day my life is hell. I also get migraines all day long....I was diagnosed with a pituitary tumor a year after this happened this has really messed up my health. Went to a cardiologist and they cant find anything wrong. Someone please help me I need answers fast.