Hi kellymaker
Try the following:
Back up your phone. perform a factory reset, restore your phone.
If it still does not perform normally, as it is less than 6 months old contact the manufacturer's customer service section (or do as the Warranty section in the User Guide that came with the phone says to do), regarding a warranty claim for repair/replacement.
The only way that the manufacturer knows about problems is if people tell them, especially during the warranty period. (which, as long as you have adhered to your side of the warranty agreement, forces them to listen and act at least in regard to your problem) Even if they give you a new phone that might be the same it has cost them and that's what they really listen to!