Hi i need some help. before using t 400 i have used sustanon 250 for 1 cycle of 12 weeks. now i am on t 400 and this is my second week, but i feel a soreness on my left chest on the far left section in the middle par tof my chest. could it be gynecomastia? the esters are proprionate, cypionate and enanthate. wat could be the problem if its not gyne? thanks.