What is wrong with my phone?

I have a sanyo incognito, the problem is that awhile back ( a month or 2 ago ) it didn't want to charge with my wall charger unless i wiggled the charger till it got into a good spot then let it sit without moving it. It charged fine in my car charger though. Now this same problem is happening with a new wall-charger... I haven't dropped it or anything! It just suddenly happened last night... I have yet to try it with the car charger btw. Any ideas??