Nexus 4 Constant Crashes

Recently, I would say within the last week or so, my phone's been constantly crashing. Sometimes it would be in my pocket, or just laying on the table, so I ruled out over heating. However, it's crashed at least 5 times in the last week and I have no clue why. Has this happened to anyone else? Would this qualify for an RMA? I can't have my phone crash without me knowing because I miss a lot of notifications and I guess you could see how that would cause problems.