I've had my iphone 5 since November and in July it started acting strangly. When I pluged it into the charger in the wall it wouldn't connect. I bought a new cord and it worked perfectly for about 2 months and now it won't work either. The only way my phone can charge is when I plug it into my car charger. It also will not connect to my laptop when I plug it in so I cannot sync it. What do I do?