Welcome to our forum Ruthie84.
I'm sorry you have been diagnosed with hypothyroidism and that employers/colleagues not sympathetic. Unfortunately it is the same with many doctors most of whom believe it is a 'simple' solution to bring the patient back to good health.
First of all, Hypothyroidism is a serious illness if untreated and once diagnosed we do not pay for any other prescriptions for any other medical illnesses.
You have to read and learn as much as possible and you can get better but it does take time. Levothyroxine works for many people but there is also alternatives (not provided by the NHS).
If you complete your profile i.e. when diagnosed, dose of levothyroxine is helpful.
First, always get a print-out of your blood test results with the ranges for your own records and you can post if you have a query.
You should have a blood test every six/eight weeks with an increase until your symptoms disappear and you feel better.
For a blood test it should be the very earliest possible and fasting although you can drink water. Also allow 24 hours between your last dose of levo and the test and take it afterwards.
Levo should be taken on an empty stomach with a full glass of water and wait about an hour before eating. Food interferes with the uptake of the hormone (levo). You can either take levo when you awake or bedtime (not having eaten for two hours before).
Also ask GP to check B12, Vit D, iron, ferritin and folate as we can be deficient.
It takes years for our thyroid gland to fail gradually so it does take a while to build up our hormones again but you may be lucky and be back to good health quite soon.
We have billions of receptor cells in our bodies, and each need the active hormone called liothyronine (also known as T3) and levothyroxine (T4) should convert to T3
The aim of your doctor is to get your TSH to 1 or lower as they no longer take notice of clinical symptoms which should be the priority. Many doctors believe if the TSH is anywhere in the range that you are on a sufficient dose. Our symptoms are the priority but many doctors aren't aware of this unfortunately.
The aim of thyroid hormone replacement is to remove all clinical symptoms and we feel good. Symptoms shouldn't be treated as 'apart' from hypothyroidism but some doctors do if the TSH is in range.