Name Change?

My SO and I are having a little girl... We came up with the name Allison Rayne around 20 weeks and most people know... I'm now 34 weeks. Well I've been feeling like it doesn't fit, like it's not right. So we came up with a few new names... I really like Autumn and we were thinking Kate for a middle name but are still looking at middle names. We also came up with Aria Isabell.. Since we decided on Allison a while ago, we are kind of skeptical about changing it. What do you think? Baby naming is stressful.