I just started taking bupropion 150, half tablet, even such low dose caused extreme anxiety to me. I got neck pains, cheat tightness, urination, headache, palpitations, cold feet, blood pressure after taking it. I have concentration, energy issues so doctor thought it would help in that case, but i am getting side effects. Do these symptoms go away with time or i should stop taking it? I am worried about my health.