I fugged up my back a couple weeks ago. Took 2 weeks before its pain free. I was scared it was bad, and the first week was the most intense pain I have ever felt(medic said it was an inflamed muscle smashing a Nerve). Its better now, but when I do deads for my new OVT routine, they are gona be pussy weight. Why? Because I rather be able to go heavy and hard later, than to screw myself now.
Rest, Not doing your back isnt going to give you gyno....I am sure you can still pull off some active training. But taking a week off at week 4 of an h-drol PCT really shouldnt be too bad. (no i have not used, I just study it daily and learn from all the information on here, other sites, and web).
My back popped, then started popping even if I turned or did a sit up. That day it didnt bother me, next day I was laying on the floor of a room in my house ripping my hair out rolling in pain groaning and yelling.... I am fine today(as far as I can see). Take it easy. I see people get ripped off of working out without weights(army/marines) so you can definitely maintain a decent workout by dropping back workouts. Then again almost every muscle in one way or another route into your back, so be careful.
Honestly when it comes to an injured back, I would worry more about it than gyno. Even if somehow gyno came on, it is surgically possible to fix...a fugged up back is a permanent thing. Messed up backs are one of the hardest things to treat. That is why I was so scared. Let it heal. Check ur pride.