Is this hypothyroidism or just depression?

No significant weight gain but 

- really bad depression

- apathy 

- extreme fatigue, constantly tired all the time, have to nap every afternoon 

- heart palpitations 

- difficulty concentrating 

- poor memory 

- itchy eyes / sensitive to light 

- loss of interest in actitivies and people 

Alot of what you say does sound like some of the symptoms I have but best to be checked out.Sometimes it could be missing vitamins in your body.Good luck.

I went to my docotor about 6 months ago with these symptoms but he just diagnosed me with depression and said that it was pointless taking a blood test for thyroid because I was missing major symptoms like weight gain, hair loss and sensitivity to the cold. 

Your doctor is incompetent. Nor even a blood test. Get another doctor. Your symptoms are entirely consistent and you don't have to have all of them.

any competent doc will do the test if only to rule something out. Unbelievable!

Agree, blood test very important.

Try taking feroglobin iron capsules. Even if your iron levels are ok in your blood tests. I take one a day and the results are fantastic.

They are about £10 for 3 months supply but well worth it.

Good Luck