it's definitely anxiety, same thing happened with me. This would happen either when my estrogen was too low or too high. And after I ate something it would get worse, I could hear my heart beating and if i tried to sleep after I couldn't because I could hear it beating as I laid my head on my pillow. I thought I had diabetes or something but when I fixed my estrogen I was fine and it slowly subsided. This anxiety would give me limitless energy, I would box for 3 hours, eat a banana then go to the gym for a full body 2 hour workout with 30 minutes cardio after it was rediculous. I went from 202 fat boy to 183 in 5 weeks with abs, I was superman, but was super anxious.
160 is a higher starting point, on 100 my test levels are around 1000 but everybody's different. Really, you need blood work. You might be bringing your estrogen down too low.
Also you say you're thinking about dumping test and just sticking with hcg... I would disagree with this approach. Ever since dropping the Human Chorionic Gonadotropin (HCG) 3 weeks ago the anxousness I've been describing has subsided. All I take is 100mgs a week of test, split up into two injections, no Human Chorionic Gonadotropin (HCG), no Aromatase inhibitor (AI) needed. Simple and I feel pretty good. Anytime I put Human Chorionic Gonadotropin (HCG) into the mix I would always get anxious even when my estrogen was supposedly in range according to blood work. The boys haven't shrunk either!