My first crash

I decided to go ride on the wet roads today. I hit a bump and over corrected. Luckily I only damaged my ego. Here are my battle scars:

 
 

I didn't cause much damage to my bike, just some scratches. My front break's alignment was messed up, so I'll need to go fix that tomorrow. Main big question is about my helmet. I've heard that you should replace it after hitting it on the ground. I did that, and my helmet has a small crack, maybe 3mm long. Here is a picture of it, but its with my phone so its very blurry. Do you guys think it is fine, or should I go ahead and replace it?