DOG PROBLEMS!HELP PLEASE! it is about my labrador retreiver, READ DETAILS PLEASE.?

My labrador retreiver is sitting right beside me, and she is growling and barking at me for no reason, she has nothing to bark about, and she is whimpering... she has gas, and she looks bloated a little bit (i can tell because I know her). and, I can say I gave her some food, all of these a little of each, fritos, green ranch dip, nachos, pears, apples, plums, orange juice... OK OK... SHE IS SPOILED... Has this happened to your dog before?? please I need answers fast,