Mono usually occurs in younger patients, but it s not unlikely that you can get it if you ve been passionately kissing someone who does have it (you need to swap a reasonable amount of saliva to contract the virus causing the condition). It does however sound like you do have a viral infection, such as the flu, as this would be the most common cause of your symptoms. Flus are managed symptomatically by using medication to manage your symptoms. This includes a honey-based syrup for any coughing, ibuprofen and acetaminophen for the aches and pains, and local anesthetic lozenges or spray for the throat. Bed rest, drinking plenty of water and chicken soup are also all indicated. If you haven t started improving after 5 days, then I would suggest consulting with your doctor so that you can be investigated further.