It definitely sounds like you are getting Peyronie's Disease. There are many web sites on this issue. I have had it for about 15 months, just the curve. Never had the pain but that is real common. The link below is with the best PD web site.
Age 60, PSA 2007 4.1, PSA 2008 10.0
Diagnosed April 2008, Biopsy: 6 of 12 cores positive, Gleason 4 + 5 = 9
CT and Bone Scan negative, Open surgery at Shawnee Mission Medical Center May 21, 2008
Right side nerves spared, Radical prostatectomy and lymph node dissection
Cather removed on June 3rd, totally dry on July 9th, pT2c, lymph nodes negative
PSA Sept 28, 2008 0.00, PSA Jan 22, 2009 0.00, PSA June 29, 2009 0.00
PSA Sept 2009 0.00, PSA Dec 21, 2009 0.02, PSA March 29, 2010 0.03
ED Status- Currently using Trimix, Levitra daily for increased blood flow.
Noctural Erections have completely returned on a nightly basis, same hardness as before.
Stopped the injections except for "Fun" weekends. Really don't need them anymore.