Check out some of the other threads for anxiety, I know its hard to believe but you might have due to chronic use of marijuana or social environment. I also had a weird reaction like you and had to take a break, i know it sucks but you have to listen to your body. Shwag is not good stuff, it really isnt compared to high grade. The process from which shwag is harvested, dried and cured isnt the best, its also mainly Sativa strains that show up as shwag and as stated before by some smart people on here Sativas are horrible for anxiety!! You need to read up on your marijuana strains so you can figure out what your smoking and stay away from the sativas and shwag. Im not on any anxiety medication because I hate the stuff and luckly it only happens when I smoke shwag or a sativa strain which is all we get in the southwest. I now grow my own smoke which is all Indica strains. So take a break and when you do smoke buy from someone who knows what there selling you and insure thats it a Indica dominate plant. Peace from New Mexico...Respect your body and your Herb!!