Professional runners plz read?

I'm a top cross country and track distance runner. But i have a hamstring pull and its taking forever to heal. i had to miss all of track season for my stupid hamstring to heal. Now im not allowed to run for a whole month and a half which is killing me now. but now i have to swim for a whole hour and a half a day. will that keep me fit and and healthy like the way i am now and will aquatic running help? I'm extremely bad at swimming cuz i just dont swim at all yesterday was the first time i have ever swam for excersizing in my life.