This is about me and my girlfriend?

well i know it don't sound long but me and my girlfriend (Chloe) have been together for 2 weeks and 3 days, but yesterday i asked her, "how long do you reckon we would be together, just out of curiousity" then she got all worried then and then she said "why you being all serious" to be honest i feel like i ****** up our relationship, help me please what do i do to get her back