Bro, Do you have, or have you ever been treated for Anxiety? I know your problem and understand your concerns as well as your new found taste for the new strength and gains. But one thing is for sure your cycle is causing your adrenal glands to surge at random times, which is normal for your cycle. But another question is do you take energy pils/drinks Ephedra or not? Stimulants like caffeine and ephedra can increase your current arrhythmias. Which are just disturbances in your normal heart beat. But it may feel like tight chest and sometimes like airbubbles in your heart. Which causes your sweats and chills. If you were not active then this would be a problem. I am 80% your not getting the flu! It is possible when starting a cycle, but you would have already seen signs like heavy mucus in the nose and chest if your immune system was starting to shut down for the flu, and you would not be getting great gains if your immune sytem was so low. In all honesty back to the fisrt question Anxiety! If you tried taking a low dose of either xanax or ambien it can help aleviate your night time chills and sweating. If you cannot get this than I would suggest taking some 5-HTP and glutamine before you go to bed. But in second any coffee or energy pills if taken can increase your problems. Another thing is watch the dose of DBOL after certain hours. Do not take DBOL 3-4 hours before bed. This can effect rest rate & REM sleep where your body starts to produce growth hormones. There are a lot of other factors but given your cycle info your just feeling the high blood pressure & arrhythimias that the D-bol and test can give during your workouts and before rest. Good Luck & make sure your diet is key - food and water intake!!!