Blue screen

i have a 5 week old iPhone 6 plus everything worked perfect not a thing wrong with it, then IOS8.1 came available, I've updated my phone and ever since I have done so my phone restarts by itself and flashes a blue screen when closing apps, or switching through different apps, the airdrop button located in the bottom notification bar disappears (has 2 lines and a bunch of dots in its place) iI've tried everything to fix it but so far I've had no luck.

anyone wouldn't know what's going on with my phone would they?