Lump In Neck? How Do I Make Doctors Listen?

Hi
up until I had my daughter 4 years ago, I was always slim and healthy. For the past three years my symptoms have continually got worse. I have thinning hair, abdominal weight gain, dry skin, heavier periods, water retention to my face in the mornings, hands and feet in the evenings, no sex drive. More recently a weird sensation in my throat when going asleep, like something moves, also very 'crampy' neck, occasionally feels like food is getting stuck. Dizziness also at various times, which is quite scary.

I was refered to an endocrinologist last year, he was convinced that I had diabetes as I was suffering from boils at the time, tests showed no diabetes, he never saw me again. My own gp admitted that the change in myself was acutely obvious, but she could not think what it could be...Maybe lupus? This was her thought not mine.

I was sent for bloods, these were the results
fbc
wbc's 9.7
rbc's 4.48
hb 14.4
packed cell volume 0.417
mcv 93.1
mch 32.1
mchc 34.5
red blood cell distribution width 13.3
platelet count 299
mean platelet volume 10.4
neutrophil count 6.3
lymphocyte count 2.8
mono 0.5
eos 0.1
baso 0.0serum sodium 141
serum potassium 4.3
serum urea level 2.6
serum creatinine 77
gfr calculated 76.9
serum ferritin 78
serum iron level 19
unsaturated iron binding capacity 45
serum tibc 64
serum totalbilirubin level 8
serum gamma gt level 31
alt/sgpt serum level 25
alk phos 100serum total protein 69
serum albumin 44
serum tsh level 1.50
i was told that the results are normal, being not very happy with this, I have recently changed doctors. I went and saw my new doctor who whilst listened to me, did not offer me any hope of a diagnosis. I told him that I have a lump in the front lower right hand side of my neck, and did he think that this would have any relevance on my symptoms. He immediately felt the lump and told me it was a cyst on my thyroid, but as my tsh levels were okay on the above results (some 7 weeks earlier), then whatever was happening to me was nothing to do with my thyroid!

To say that I was disappointed was an understatement!

I am a blood donor and the above blood test was taken 48 hours after I had given blood.

I know my body better than any doctor, I have gained three stone in three years, although I cycle daily, look after a toddler, main carer for my parents (one is blind, the other has a heart condition), I have a very poor appetite, I am never hungry and can only eat small amounts, ie. Cereal or toast for breakfast, fruit or sandwich for tea, sometimes a bag of crisps or fruit as a snack throughout the day.

My doctor says that it is normal to lose hair, and also maybe I am eating my main meal (a sandwich or fish ) at the wrong tiime of day (4.30)
i would like anyones opinion... The more the merrier.

I want to know what test anyone thinks that I should have...Would an ultra sound on my neck be helpful?

Also should I have my t3 level checked.

Incidently I took my basal temperature every morning for 10 days, on eight of the days it was 96.8, the other two days it was 96.1
any help please, or advice on getting doctors to listen to me...