pains in head and inflamed lymph nodes

im a 29 yr old mum of 4 about 2 yrs ago i started getting headaches and dizzy spells with loss of balance i went to hospital they didnt do any tests but put it down to vertigo and gave me tablets whiched helped alittle but not alot then about 6 months after that i was getting an aching neck that was a bit swollen on the right side so went to my gp who sent me for a ultrasound which they found a few swollen lymph nodes but said not to worry it was probably nothing now a year and a half later i have had another US which revealed inflammed lymph nodes on both sides of my neck front and back in my armpits and in my groin the consultant didnt seem that worried cos of my age but the pain and aches are constant in all these areas have had blood teats which came back normal am going to see a ENT specialist at the end of this month so hopefully they will be able to shed some light on what is wrong with me but in the meantime if any one has any ideas as to what it could be all advice would be very much appreitiated thankyou