I can't believe you guys are telling him it's not gyno. You either don't know what gyno is or just trying to make him feel good.
Yes it is man 100%. Nolvadex will not help at this time. I took Nolvadex for 4months with Proviron for 2months and did fuck all. Nolvadex is only useful at the early stages, when you get itchy nipps or minor swelling of the gland. If the gland keeps getting stimulated by estrogen (or progesterone), it keeps getting bigger and you form female breast tissue. The breast tissue will not go away without surgery. Some swelling will go down, but you will always have it. Once the breast tissue is developed then your chest starts storing fat like women do in their breasts. That puffiness is a result of that.
You can do all the cardio in the world but you will not get rid of it. I used think the same thing ans was in denial for months until I finally realized it's here to stay. Try trimming down and compare the rest of your body to your chest. Any part of your body will always look better then your chest.
This is my advice. Go see an endocrinologist and let him examine you. Ask for an ultrasound to be done on your chest to see how much breast tissue is there. My doc examined me and said it's only fat. When I went to the surgent he said you have breast tissue but not that have much. After the operation he said there was more breast tissue then he thought and said I got a good deal on the price.
Also get your hormones checked out and see if they are normal.
If you want more info just e-mail me and I will help you as much as I can. I went thru hell and know how it is.
Good luck