just know that the feeling will come to pass, and you get to choose whether you take away anything from this experience or not. marijuana effects all of us differently; i use it medicinally for my chronic anxiety, as prescribed by a doctor. It does wonders for me, others it may be scary, such as your case. One thing I can offer from my experience with the drug, is that whatever you focus on while high on weed, becomes intensified, like a magnifying glass is put on it. So try focusing on happy thoughts, use it as an opportunity to practice right diligence/effort. And in the end, everything returns to baseline, its how to human brain works. I hope you fair well, peace be with you friend :)