your hormones are in overdrive right now, so it's perfectly normal for you to be moody. she's only 5 months old, she's not a brat, yet. but as the previous poster stated, she just might end up that way if you continue. get on the floor and pick up everything that could possibly harm her. you need to get down on her level to see what she can and cannot get into. it's also normal for a 5 month old to put everything in their mouth. that's how they explore the world. she has no idea what is and is not dangerous, so it is your job as her mother to babyproof the house, or atleast the areas she will be playing in. as for the teeting, the only thing that worked for my daughter when she was teething was a beef jerkey stick. she would gnaw on it for hours, but it kept her quiet, and happy. not the most nutritious option, i know, but it works! there is no need to give her the whole thing, just a piece big enough for her to hold on to, i'd say about 6-7 inches of it. redirect her when she gets into things she shouldn't. but there's no reason to scream and yell at a 5 month old. it's not going to get you anywhere. she has no idea what your saying, and it's only going to frustrate both of you. keep in mind, that she will pick up on your stress, so try to keep it to a minimum.