Multiple problems with iPhone 5S?

I've been having a few problems with my phone recently. I have an iPhone 5S which is updated to date (IOS 9.2.1)
But I've been having multiple problems, the first being that on occasion I can't send texts, they just get stuck trying to send. I also can't send any photos in messages, I have to go into my camera roll to do it. When I go into camera roll and try to delete photos, sometimes the app will close. And the last thing is that every time I open apps like Snapchat, Facebook and Messenger, they always close.
I don't really know what to do. A week ago none of this stuff was ever happening, but now my phone has just randomly started having all of these problems.

I've been having a few problems with my phone recently. I have an iPhone 5S which is updated to date (IOS 9.2.1)
But I've been having multiple problems, the first being that on occasion I can't send texts, they just get stuck trying to send. I also can't send any photos in messages, I have to go into my camera roll to do it. When I go into camera roll and try to delete photos, sometimes the app will close. And the last thing is that every time I open apps like Snapchat, Facebook and Messenger, they always close.
I don't really know what to do. A week ago none of this stuff was ever happening, but now my phone has just randomly started having all of these problems. It sounds like you need to completely restore our iPhone. Restore through iTunes and set the phone up as a new phone (not from a backup). This is a very mundane process but should fix all of your issues.