I signed a quit claim deed to my girlfriend as Joint tenants with full rights survivorship. Does she currently have any ownership of my home?

When I purchased my home I was the only person on the deed and I was the only borrower on the mortgage. My girlfriend did not want to commit to being on the mortgage but was helping to pay the part of the mortgage, in essence she was a tenant on mine. However she wanted some stake in the house if she was contributing. So my real estate agent suggested we do a quit deed claim. My understanding was that I was the sole owner of the house but if I died or I wanted to give her ownership of the house then by having a quit deed claim I could easy transfer ownership of the house if I wished. The quit claim deed states that I quit deed claim to myself and my girlfriend as joint tenants with full rights survivorship. What does this mean? Does she have equal ownership in my home now or only if I die will she get ownership? If we were to separate does she have any ownership? My understanding is this only means I can easily transfer ownership to her if I want or if I die?