Neverending sickness

Hello, Iam having very hard time. I am suffering with tonsillitis for over 2 weeks. My first doctor visit ended up with amoxicillin - which work for me until I stoped - two days after I finished taking antibiotics my tonsillitis grown into two huge red tomatoes, so I went to the doctor again and ask for every single possible test what she can think of to find out what is wrong with me. Testing included STD and came back all negative. Only positive was test for glandula fever in my "past" which has not been detected in nowdays stage.Because my neck was still in disturbing stage, doctor gave me this time Doxycycline and told me to take it if it gets worse. Right now you can literally see huge balls on my neck, on right part is getting blue and pain is becoming excrutiating going into my ear and kept me awake all night long. I started to take doxycycline, but this does not seem to help. Please tell me what to do. Thank you.