First Mommy Meltdown

Okay so this is my first baby that I am expecting in August. I am a huge planner/organizer so I've been trying to get things washed up and ready. Anyways, I washed all my bottles and parts, sterilized my nipples in boiling water, then put them all together and up in the cabinet. My fiances mom came by and started freaking out because the bottles had a little bit of moisture in them from not being completely dry before I put them back together. She was saying I'm going to give my baby a bunch of bacteria from doing that. Of course after she leaves I have a total meltdown. I thought I was doing a good thing and now I feel like I'm screwing all this stuff up. Any advice?