The itsy bitsy spider climbed in the wrong garage..

Sorry for the horrible picture with no explanation. Yes, this is what I found in the garage after I picked up Camden`s car seat off the floor and loaded it into the car. I looked to my left about 3 feet away and there she was! I hate her! As soon as I saw it I yanked Camden out of his car seat and put him upstairs in a safe place while I tried to kill it ,which I couldn't`t do because she was to fast. Every time I came near her she would scurry into the wall. I got a pic using the zoom on my camera. I posted it here so Chris could check it from work. He did not believe me at first he thought I was overreacting. But the picture proved it. I had to wait for Chris to kill it when he got home. It even took him a few tries but she is gone now. The question is ..are there more? We are currently trying to find an exterminator and we turned our living room upside down making sure there was not any under the couch. I also, most importantly, checked Cam`s room as well. We found nothing. The thought of this thing being that close to Camden made me cry and freak out. I hate spiders! But A black widow could be extremely dangerous to a baby. So that was yesterday and I`m still a little shaken up about it. It gives me goosebumps just writing this. And I am on edge in our own home. I will not go into the garage again until a professional comes and checks it out.