Is it normal that i bad trip on weed only after two years of smoking?

I think i know why it's occuring but theres too many different people saying things about it that i dont know if its directed to me..This year i did way too many different drugs other than weed and i thought this was the root to my heart hurting and lungs and getting nervous after smoking..Its only been happening for a about a month and a half and i always have to basicly fight through it? idk if thats even healthy..fresh air helps it but as soon as i get indoors, i feel like it again and for the rest of the day but not as worse..i had only one other bad reaction to my heart and that was because of my stupid friend giving me mexican diet pills that gave you alot of energy which was the same as adderalalmost but those days are long gone and i havent touched any other drug in about 2 and a half months.. could this be from doingdrugs or is it anxiety and what should i do..no judging please, i regret touching other drugs because its stupid so no need to tell me, im just in need of some answers because i have been feeling wierd heart pains outof nowhere for a split second some days when i havent smoked, like cmon lol weed is my friend, why is it doing this to me..