I can relate to you your experiences, Viola. It is always hit and miss with GPs. I went to see my regular one just before christmas and told him I was feeling low, etc. He said I had mild depression and wouldn't need anti-depressants as they are for the long haul. I pointed out that I was already on Venlafaxine, and lithium, he looked at his screen and said 'oh yeah, so what would you like from me today then?'. I ended up getting 28 zopiclone, thanks! Yet the antithesis to this is when I saw a locum GP back in July. She asked what was wrong, and I said I am very depressed, she smiled and said 'Yes, I know that, Colin, could you explain a bit more please? She had actually read my notes before seeing me and was very helpful and very kind. She thought I may be bipolar and increased my mirtazapine to 45 mg. Like I say, it is pot luck.
Keep persevering, Viola, you deserve all the help available and try not to get fobbed off by ignorant GPs. They have a duty of care to you, whatever your condition.
All the best