My phone

So my phone is giving problems which is very strange, in the whole year that I have had the phone it has never once given me a problem but all of a sudden it wants to go haywire. I own an Iphone as some people may know the Iphone is a very reliable and smooth operating phone it rarely succumbs to freezing and other issues that some other phones that shall remain nameless suffer from on the regular. My problems started one night when I was on the phone with my girlfriend I noticed that my screen was flashing black and white, I was on my Bluetooth so I unlocked my phone to see what the problem was after unlocking it I noticed that it was acting very sluggish and that the battery meter was saying it was close to dead when I had in fact just taken it of the charger a minute ago. After noticing these problems the screen went black again and my Bluetooth headset got real quiet not even the random static every once in a while. I said hello but no one answered when I tried to turn my phone back on it failed to come on and then it said that it needed to be charged and was completely dead. Upon returning to my room I plugged my phone up and attempted to turn my phone on but it failed to turn on in the end I had to reset my whole phone and ended up losing a few numbers because I had not backed it up in a while. I plan on getting a new phone soon.