Hi HIV (human immunodeficiency virus) can be spread via blood, sexual contact, from mother to child during delivery and during breast feeding. The chances of transmission are reduced since you did not have insertive intercourse, however the fact there may have been open lesions on your hand because of biting means that this may have been a route of transmission. It is good idea to have the HIV test just to have an idea of your status. Oral thrush is caused by candida infections and it can occur as a result of impaired immunity, medications and stress. It is treated with antifungal medication. Swollen lymph nodes respond to any sign of infection or inflammation in the area that they drain and may indicate a local infection. Sometimes lymph nodes themselves can become infected and enlarged. Enlargement can also occur in more serious conditions such as lymphoma or leukemia. I hope this information in helpful and I wish you the best.