I am not a person who enjoys going to the doctor, and i have really hurt my back, been doing a lot of work and shifting a washing machine up stairs and things. well i was on just grass and getting by, and then came ibuprofen, which didnt bother me but the pain was still too much while i was working. A friend gave me 30/500 cocodamol, and i have been taking about 2 per 2 hours, and occasionally one or half of one between. And now smoking cannabis, im feeling pretty drowsy and spaced out. Is this ok? should i be worried.