Weird bug with phone calls, IOS9 iPhone5

Hi all. This started last saturday. Now i have a 64gb Iphone five which is running pretty well with IOS9. Yes, I get the sometimes voice over not responding when an incoming call, I also get the no vibration when a notification comes in, here's one step further. Last weekend, my voice mail went off. seeing it was a family membr, i returnedit, then went on with my day. But, when i looked, the phone hadn't rung, no incoming notification, phone wasn't muted, and there was absolutely no record in the call lsit of the person. It did the same thing a couple of days ago, wednesday I think? i at first chalked it up to a weird thing but now twice in a row? Ok not in a row, you get the idea. Has anyone else had this? I swear if it does it a third time, I'm getting the sixSPlus