Judging by the symptoms you're receiving I'd definitely presume you have shin splints which can be fixed by non-impact exercises such as swimming. Usually they heal after you're not using your legs that often in approximately 2-3 weeks. I know how painful and annoying they may be, and I hope that if you do go to a doctor (which I suggest doing) it isn't something worse.

I used to get these during lacrosse conditioning, so I know your pain. If you're only getting them from physical activity it's safe to say their just shin splints and, like mostly everyone else on this thread said, they will go away in time.

Thank you guys very much really helpful.

x-rays know all 

happens to me when i walk fast 

my friend said its the way you walk