Hi Guys! RIght now i want to hear some encouraging words.

Yesterday i bought 5g speed(could not buy less). It is only my second time to use and i also wanted to use it for studying. I got a free sample first which was like a smaller rail (i dont know maybe between 50-100mg) when i arrived home i snorted a bigger rail , it was fun for 5-6 hours i was a studying robot, but then the comedown began... and foolishly i kept chasing it.... i snorted a big rail at 10:00 PM and then after 10 minutes when i did not feel so much euphoria i snorted also a bigger one.... oh boi... hell opened its gates. severe heart race, palpitation, left cheast pain, incredibly hard breathing, crushing chest, tingling all over the body of course i was crazy anxious but this time i felt like i am having a heart attack or some cardiac failure. it was terrible. MY BLOOD PRESSURE SPIKED TO 190/100 and although it was the highest it kept fluctuate. I felt the pressure at the back of my head . i survived the hummering heart until 06:00 AM and then the palpitation decreased. But with approximately (i dont know exactly but around 500mg speed) of course i could not sleep. I took 25mg quetipaine (seroquel) which sedated me but...... it just amped up the heart race..f()ck that shit... i thought i am going to die for sure. after i popped 1mg alprazolam and 0.5mg clonazepam. these helped me only and i could sleep for 4-5 hours approx. Right now the situation is the following: i have still heart palpatations and a little pain is coming from the left side of my chest. it is not severe but scares the shit out of me. Blood pressure is still high in the last 1 hours i measured 120 for the diastolic!! although the systolic was good. the last measure was 160/88. but when the benzos kicked in it was 118/77. Heart rate is approximately 110-120BPM. I popped also 25mg metoprolol and other .5mg clonazepam and now i measured 126/81 with 103 BPM. I am really afraid that with one usage i fucked up my cariovascular system. is it possible? Appreciate the answers guys!

PS: I am 27 years old, almost 200lbs, 6'5". Athletic