Peyronie’s disease is very rare… so don’t get yourself all stressed out about it. It may pay though to get yourself checked out, for peace of mind.
Your left side is your weaker side, and you have been putting more stress on that side, to try and straighten it. When you do manual stretches and extend, you naturally put more stress on that side. Also, semi erect bends is not part of any Newbie Routine, for a reason. So, this all equals… injury.
I’ve done something similar, and also have some slight pain/discomfort on my left side. I’ve taken a month off, to let it heal. After about 2 weeks the pain has disappeared, but I’m going to take another 2 weeks off to make sure. I suggest you do the same, unless you want to do more damage and need a longer time off.
Try taking a week off first, and during this time mentally prepare yourself for a long rest period… I found it easier this way. While you are recovering, think about your Routine, and the mistakes you have made, and come back wiser and stronger ;)
Starting Stats: BPEL 7.0¨ x MEG 5.3¨ (4th Nov 2015)
Current Stats: BPEL 7.83¨ x MEG 5.6¨ (14th June 2018)
The Dream: BPEL 8.1¨ x EG 6.1¨ (Not sure if the wife supports ¨the dream¨)