Swollen Lymph Nodes. Severe problems!

Hi, I have swollen lymph nodes all over my body, starting from my head towards the groin. I have been noticing them for one week now. They do not hurt or irritate me, nor do I have any other symptoms. Just the feeling of it is very concerning, and I feel like my heart has also weakened. I do not have any history with diseases never had any severe problems regarding health. However, I have been employed for the first time about 40 days ago and have been using meth regularly since then. I am getting an average of 3 to 4 hours of sleep and working 8 to 9 hours daily in routine and hardly any workout. I am maintaining my diet as best as I can and drinking adequate amounts of water each day. I do not have any other symptoms other than the swollen lymph nodes all over my body, plus I've also had a tingling sensation in my left thumb and index finger, which are both swollen as well since last week. Other than that, I have no other symptoms. I have researched lymphatic system as well. Thanks!