I’m glad you have quit marijuana. You probably had good reasons that continue to be true.
Has it occurred to you that you are suffering from withdrawal? You didn’t mention how much you were smoking or if you were also taking other drugs. I’m glad you quit, but “cold turkey” may have been tough on your system. It also occurs to me that you could just coincidentally also have a “flu”.
If this has continued since you wrote, please see your doctor to determine if you are physically ill and/or if you need some medical support while you give up the weed.
I wish you well.