swollen lymph nodes (hard), painful breasts

i have recently had a lot of sinus infections for which i was sent to an ENT. At the ENT i found out that my right maxillary sinus was extremely swollen and that my voice box was still swollen (3 years now, and i am a singer) and now has contact ulcers on it.
For the past year i have had swollen lymph nodes in my neck, hard and only painful if i have an infection. and for the past 6 months my breasts are extremely painful for 3 out of every 4 week cycle. only settling when i menstrate. my doctor ran some tests last week and my white cell count is normal, so is everything else (blood sugar, hormones etc). i am still waiting on my thyriod results though. i am now at a loss and am barely making it through one night a week of singing let alone the 2 nights that i have to do. i am now starting to be really scared that i have a lot of signs of cancer except for the white cell count. any help would be greatly appreciated.
thankyou