Weed 'acts' differently for everyone...some people its great, not so good for others. Take a break for a while and start up again, depending on how you feel after is your choice whether to carry on smoking or not.

Also it could be the type of weed your smoking, i mean i used to get weed from one guy and it made me feel horrible then i'd get it from a different guy the next time and it would be great, so possibly try getting a different strain or from a different dealer.