Accessing SharePoint With Public-Site Externally Hosted

I currently subscribe to Office 365 P1 Plan. I have my public-facing website hosted externally and as such the DNS address record was set accordingly.

This has screwed up accessing my SharePoint site however. Office 365 doesn't allow me to make a CNAME record to prefix sharepoint.MYDOMAIN.com either.

Tell me that Microsoft hasn't screwed its users by only allowing them to access SharePoint by manually entering in the URL have they? There has to be a way to create either a forwarding rule or sub-domain to access SharePoint. Typing it in manually simply isn't an acceptable solution and would be another hit on the list for Office 365 downfalls.

Please advise.