I found bacteria in a sample of yellow sputum. Can you identify them?

I've been having this post-nasal drip type feeling for about 8 months now that has not gone away even for a minute. I've been to multiple doctors who say it's allergies. However that does not explain the yellow sputum...I'm a biology major so I decided to pull out my handy dandy microscope and took a sample of the sputum and found hundreds and hundreds of bacteria floating around. There were tons of animal cells that you could not see through because they were teeming in bacteria, like hundreds of ants swarming around it. So I'm showing you a picture and might post other questions with new pictures like this one just to ask you, what are these bacteria? Are they anything to worry about? Here is one picture..this seems to look like yeast to me but I'm new at this so I really don't know. this is at 2000x magnification.