I m not sure if this is a mental health issue, but I have been a heavy marijuana user for 30 years , smoking daily with the exception of a few weeks a year trying to take a break . I am fully aware of all the usual withdrawals such as insomnia, etc. It has been over 8 weeks since I last smoked and I feel a strange sick feeling off and on, and wake up to anxiety even though I take Sertraline (Zoloft) for 15 years. I m not sressed or worried about anything. (I had horrible anxiety in2001 due to fear and hopelessness, but those issues have subsided, and I have no worries about my future now that I m older (53). It s really more physical and it s very hard to find others who share my feelings after 8 weeks sober. Should I proceed with a blood test?