Hey there, I think I've basically been in the same position as you are now.I became very obsessed with my appearance and did alot of weight training to get an athletic body but kind of took that too far and have got alot of injuries which mean I haven't been able to train for a year now.
I too wanted PS to improve my appearance further and had done since I was about 12.
I'd advise you to approach everything in moderation, and that includes your training too- don't go abusing steroids or other drugs.
As far as the surgery goes you sound unhappy in general, I know this is what caused me to seek to improve myself physically, maybe you should see a counsellor and talk through why you want things altered.
If you are happy with yourself as a person and just feel an aspect of your appearance is holding you back, then a well researched, cautious approach to getting what you want altered is a positive step.I think from the tone of your message though that you do need to talk to someone about how you feel.
I don't mean to preach man, just like I said I've been there.