welcome to Healthcare Magic.
Weed contain cannabis. Usually it is used by smoking. Long term smoking damages lung, which can lead to chronic obstructive pulmonary disease
(COPD). COPD commonly present as productive cough most of the days in year.
Cannabis also affect immediate and long term psychological health. Palpitation
may be due to anxiety
in your case. But same time it is better to seek evaluation to rule out thyroid
and cardiac related causes of palpitation.
You should seek consultation for current symptoms from general physician. If no cause is found for palpitation, you may consult psychiatrist
to rule out anxiety in your case.
Wish you all the best.
Dr Ashish Kumar Mittal