Hospital bag?

Suzie • First time pregnancy my husband and I have been trying for a long time so I'm very thankful/nervous about it!
When did you have your hospital bag ready? 
I'm just about to be 30 weeks but...
-I don't want to put a bunch of stuff in there that I might just have to pull back out
-Feel like I'm just being too anxious (I've had some friends deliver 32/34 weeks)
-Haven't had my shower yet (it's on September 17) so I don't have a lot of the stuff I will need anyway. 
Should I just get to the stuff I already have together? 
Am I just stressing too much? Lol