swollen in my lymph nodes , i needs extremely help

i'am 21 years olds ,, i have noticed a swelloen lymph nodes in armpit before a year ago and i did an ultrasound pictures and it sized only 2 mm

and now after i did another ultrasounds pictures and its sized 13 and BILATERAL wich means its not reactive .. painless and palpable

no medical history or family history with breast cancer

breast normal

CBC normal

no focal inflammtion in ultrasounds

what's the next step to do ?

Are they still swollen from one year ago ? 

Not reactive  or from infections.... how do you know that 

yes i did an ultrasound before a year ago and it was 2mm and now its 13mm and the other one is 9mm ,, which means that it still growing another meaning that its Not REACTIVE

and abt the infections ,, its not painful at all and beside to that  they are from very long time ago which is definitely not infections !

 

Most Lymph nodes swelling is from infections;

Most generalised lymphadenopathy is due to benign self-limited disease, such as viral or bacterial infection but it can be caused by a wide range of conditions;

Causes

Generalised lymphadenopathy may be caused by a wide range of conditions, as follows:

Viral

Common upper respiratory infections

Infectious mononucleosis, cytomegalovirus (CMV)

Rubella, varicella, measles

HIV

Hepatitis A and hepatitis B

Roseola infantum - human herpesvirus type 6 (HHV-6)

Dengue fever

Adenovirus

Bacterial

Septicaemia

Typhoid fever

TB

Syphilis

Plague

Lyme disease

Tularaemia

Brucellosis

Protozoal

Toxoplasmosis, leishmaniasis, Chagas' disease

African trypanosomiasis (sleeping sickness)

Fungal

For example, coccidioidomycosis

Autoimmune disorders and hypersensitivity states

Juvenile idiopathic arthritis

Systemic lupus erythematosus (SLE)

Drug reactions (eg, phenytoin, allopurinol, primidone)

Serum sickness