Girlfriend needing space

Went on a short break for 5 days with my gf of 6 months, 3 days into holiday she started acted called and distant and wasn't her self just felt like she was just a different person, I asked what the problem with was a she kept telling me nothing until I asked her if she still wants to be with me and she told me that she doesn't know what she wants and her heads all about the place and she needs some space, I left her alone for a couple of hours then texted her saying I'm sorry for anything I've done and she told me that she's not ready for a relationship, the next day she said she still want to be with me but still acted distant and cold towards, all I've been getting is mixed signals we had sex 3 times after her saying she's not ready for a relationships and now we are back at home and having a break and she needs some time but don't really know how to take it