Hard to say, Sunshine. We're all different - as Sweetness pointed out a while back - and things are rarely as clear-cut as we'd like them to be. I'll tell you my story and leave you to make up your own mind.
Around my late 20s, and largely because of finances, I stopped eating meat, then gradually found I didn't need fish either. I also cut back drastically on eggs and cheese, so was eating a near-vegan diet. This meant I had to eat a lot of pulses and whole grains, of course. When my finances improved dramatically about 10 years later, I didn't see the need to start eating meat again. In fact, I'd gone off all animal foods and couldn't get them down, so I continued on my rather restricted diet (which I enjoyed eating) till I was in my late 40s. During this time I got several crippling episodes of arthritis in all my joints, the worst being when I was only 37 - and all of them much worse than anything I get now, at age 71! I saw a wonderful homeopathic rheumatologist, who told me I was exaggerating with the pulses (beans, chickpeas etc.) and also rhubarb and coffee! This turned out to be true. Once I cut out rhubarb and coffee, and cut back on pulses, the arthritis disappeared. This, however, meant I had to eat even more whole grains to compensate.
In my late 40s I suddenly started to crave meat, so allowed myself to eat it occasionally. (My original switch to vegetarian/vegan hadn't been on moral or religious grounds.) I've continued to this day eating meat about once a week, quite a lot of fish, and vegetarian at least twice a week.
At around the same time, I found myself becoming less tolerant of grains in general, which had been a staple part of my diet for 20 years. I still eat a few whole-grain products to this day, but have to be very careful not to overdo it, as they give me a sore, bloated feeling in my stomach.
At the time, I put both these changes down to the after-effects of a fairly early menopause (at 45) for which I've never taken HRT. Around the age of 50, I started getting the first symptoms of Sjogren's (dry mouth, dry eyes, stiff hands, peripheral neuropathy, Reynaud's) but it was another 10 years before I got a diagnosis, like most sufferers.
So... the point of this long story. Seems to me there are all manner of chickens and eggs in there and I don't know to this day which were which! Did I get Sjogren's because I started eating meat/fish again? Or was it the result of the previous 20 years of eating pulses and whole grains? (The arthritis definitely was, as I hardly have any problems with it now.) Is the fact I don't tolerate a lot of grains now because my body rejects it, knowing it's bad for Sjogren's? Or did I get Sjogren's because I cut down on grains? Confused? I certainly am!
You see what I mean? You're obviously doing the right thing keeping up gentle exercise throughout the crisis. That's always worked for me. Two servings of ice-cream per day might be overdoing it a bit - lot of sugar in it, plus all kinds of additives.
I've been largely in remission for about six years now, though I've had a few problems with dry eyes this last winter (one attack of conjunctivitis). My own policy is to eat as sensibly as possible without overdoing any one element of my diet, and to listen to what my body is telling me. My stomach no longer appreciates a lot of grains? OK, then - I don't eat a lot. But I eat a couple of servings of wholemeal bread a week, and maybe one helping of porridge, to keep up a wide range of nutrition. That goes for treats too, unfortunately. My stomach has recently started telling me it doesn't like wine so I've had to cut down sharply on that! (I live in a wine-drinking country where the stuff is much cheaper than the UK.)
It's all a question of balance and listening to your body. But without getting obsessed about diet.