Hard drive partition completely missing
So today, I tried partitioning my hard drive with boot camp. I followed through with it and restarted my 2015 Macbook Pro (El Capitan). However, it did not boot to Windows (Windows 10), and nowhere does it show that it was partitioned for windows. I can't even see the bootcamp disk in disk utility. However, I know that something was partitioned because even though this is a 500GB SSD, it says that its capacity is only 371GB. How can I restore all the capacity back to the Macintosh HD disk?
MacBook Pro (Retina, 13-inch,Early 2015), OS X El Capitan (10.11.4)