Ask your doc about starting on Pentoxifylline, it's the generic for Trental. If he is a urologist also do some research online about and bring up Dr. Tom Lue, he's a world renowned expert, your urologist will know him.
I made the big mistake of taking propecia years ago and it did quite a bit of damage. I saw Dr. Lue a few years ago and was put on Pentoxifylline, 400mg, 1 tablet 3x a day and have seen some improvement in restoring size, about 90% back to where I was. Also, some improvement with an indentation and slight curvature. Your curve is likely Peyronie's. I wouldn't delay, your injury is fairly recent and I know Dr. Lue sometimes treats men who are close in time to their injury with 6 tablets a day for about the first 6 months, 2 taken every eight hours. Then cuts it back to one 3x a day.
If you do end up taking Pentox, I found the generic from Mylan to be more effective with fewer side effects than 2 other generics I tried, I get it at CVS.
If you are having any pain or notice an area with a slight firmness when it should be soft you should start to notice improvements from the Pentoxifylline fairly quickly. Many men on Pentox have also added low dose Cialis, 2.5mg about every 36 hours to help with the curvature, there seems to be an anti-fibrotic healing effect.