Next Season Questions

So I just started playing league in the fall 2014, and I hit 30 during the preseason waited a while then played ranked, had some bad teams AND did badly (combination of both) and still got into S4, but then I dropped to B1 then B2 then climbed back up to B1.

Bascially my MMR is shit and my LP gain and loss is horrible ( gain 10-15 for win lose 20-25 for loss). I was wondering if next season my LP loss and gain is reset and based on the placements we have to play?....or am I doomed to stay in Bronze forever due to a bad start?