So every few minutes, regardless of what app I'm using my camera comes on, other times my phone randomly screenshots. I've already tried clearing the catche, that did not help.
put the phone in airplane mode to see if it continues to open the camera app randomly. If it does continue then one of the triggers to open the camera app is being seen so go to settings->advanced features->side key and set the double tap to something else. If the other app opens then you may have a faulty side key/ power button.