MacOS hdd partition does not show up upon installing Mojave

I installed Mojave on my iMac 27 inch mid 2011 recently. I have a boot camp partition disk and booted Windows 7 (like I always have in High Sierra). When I attempted to boot back to OS X, it kept booting me back into windows. When I looked at the boot camp manager, it shows that my main HD partition doesn’t show up. My main HD doesn’t show up in the Computer folder on Windows. I am running Boot Camp V5.1 Please help. I am afraid that my main hard drive has been erased.