On my first time, about 4 months ago. i smoked 5-6 rolls(of weed or probably tobacco, not sure)i haven't smoked at all ever since. but about two months later(this month)ive been having palpitations and other undesirable symptoms and two panic attacks?

I would not blame that exposure 4 months ago for symptoms starting 2 months later. If there was something in the material that hurt you the signs would have showed up at the time of use or shortly thereafter (days). There are many things that can emerge at your age that trigger such events. See your doc and have them sort this out.

It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water. Wish you good health!