Well, this cycle is quite a mess, and many things could have caused gyno here. First of all, you must always run an AI from the first day of the cycle in order to control estrogen levels and avoid estrogen related side effects, including gyno. Secondly, you were using a nandrolone based steroid, so you should be using soma ancillaries to control prolactin levels (such as cabergoline), which can cause very similar side effects to those of estrogen, yet again - including gyno. Finally, HCG has been proven to cause suppression and gyno, so this is also an option. As for wha can be done - incorporate an AI into the cycle, and start using cabergoline. if that does not help, run the anti-gyno protocol - it shoudl help.