Consuming a relatively foreign item by accident can be a cause of concern, but it is important to stay calm. The symptoms to look out for include nausea, digestive problems, and fever, which could be a sign of any infection. The mere presence of bird droppings may potentially harbor pathogenic organisms, but it normally takes a heavy exposure to cause illness. Be sure to drink enough water and observe your health condition. If you experience any unexpected symptoms or are not feeling well, please get in touch with a doctor. Such professionals are capable of giving you the right pieces of advice based on your situation. Do not forget, in the first place, your health is the main thing.