Hi Cathy, and welcome to the forum - but sorry you are having such a tough time.
RA has so many strands, and I sometimes think that not enough attention is paid to how terribly debilitating the fatigue is. This isn`t helped by the amount of medication we have to take, which is very much a process of trial and error until you find the one which works best for you.
Clearly, your GP needs to attend a course on how to speak to patients with a chronic illness - it`s support you need, not casual throw-away remarks like that.
I was already retired when I was diagnosed, almost 8 years ago now, but even so, I struggled terribly in the first 18 months, often in tears of pain and frustration. Luckily for me, my own GP was fantastic, and helped preserve my sanity while I struggled to come to terms with the limitations RA imposed on me. I also have a very good rheumy team, and am wondering if you have access to a rheumy nurse? They are a very good port of call when things are really bad. Oh sorry, just noticed you do have one - call her again and tell her how you are feeling.
I think rushing back to work is the last thing you need right now - rest and being kind to yourself is more important. As for your nurse being realistic/unrealistic, it`s important to believe that there is indeed light at the end of your particular tunnel : there are so many drugs out there now, and one of these, or a combination of them will be right for you. Once your RA is under control you will see a huge difference in your quality of life - my "magic" potion is Humira. Prior to that I was in a wheelchair for all but the shortest of distances, and I don`t need it now. Try to look no further than one day at a time - easier said than done, I know.
Take care, and do keep posting as we`ll do our best to help.
Kathleen x