Why is my Blackberry continually showing a moving "timer" symbol every time I try to do something on it?

Since last night, the majority of the time I try to take a photo, upload a photo or send/read a text or email, there is a “timer” symbol in the middle of the screen. There is a hand going around on the timer, and the screen is frozen for varying amounts of time. Then it will unfreeze and I can continue on doing what I was doing.

I am not very tech savvy and I have not played a lot with this phone, so I have no idea what’s going on with it. Any ideas?