OMG i feel like the worst fish owner ever!

i had my new betta fish (who I have yet to name) in a small betta kit bowl and I was going to move him into a slightly larger critter carrier, (until i can get him something even bigger) which at the time i purchased him, still needed to be cleaned. i had him floating in a zip-lock sandwich bag so the temperature would adjust. so i waited a while and then I went to go let him out of the bag. I started to pour the water out of the bag and into the net to catch him. and somehow I missed the net, and he fell into the sink, and DOWN THE DRAIN!!!!!

I started screaming for my dad to come and open the pipe! He finally got a wrench and opened the pipe and lo and behold, there was my poor fishy, stuck in the trap swimming around in dirty disgusting water! I put him into his freshly cleaned tank. it was a miracle he was big enough to get caught in the pipes, but i'm still not sure he will survive this ordeal! someone please help me! i feel soooooo guilty! I should have been more careful! I will NEVER forgive myself if he dosen't make it!!!