My Lottie Girl

My sweet Lottie girl doesn't seem to be doing so well lately. About a month ago she threw up several times over the span of 2-3 days. So we stopped feeding her dog food and switched to bread, pasta, etc. for a couple days. She got better. Then for the past week or so she hasn't been eating much. Her bowl would have food in it from breakfast all the way to dinner. If you know my girl, that has never been the case. She has always eaten her bowl of food immediately. She isn't the kind of dog that nibbles on her dog food throughout the day. So it kind of bothered me that she wasn't eating normally but I tried not to worry about it. Yesterday Lottie threw up again in the morning before school. Two different places. So I've cut the dog food again. Gave her some bread, pasta, and a plain baked potato over the last two days. I just don't know what is going on with her. She sure has me concerned. I don't know what I should do. Everything else about her seems normal.