It is a pity that you have not had a meter so you could have seen how various foods affect you - but that can't be fixed now - so I'd guess that you can safely eat any meat or fish, eggs, cheese in moderation - but any sort of salad, and mushrooms, peppers, cauliflower, courgette, radish, bean sprouts, cucumber, cabbage, spaghetti squash, aubergine, celeriac, celery, leeks, spring onions, french beans, petit pois, chard, kale - there is no shortage of things to eat, and you can probably add the lower sugar fruits in moderation.
I buy creamy coleslaw, extra virgin olive oil, red and white wine vinegar, mayonnaise - and Lidl protein rolls as they do not spike me.
I just planted rhubarb as that is probably going to be useful.
I have low carb mixtures of vegetables and berries in the freezer so as to have them there as a safety net if for some reason I can't get to the shops.
If you want to eat heavier carbs I would advise caution and to go by your meter, to see what portion size is advisable. I was so ill when pregnant and forced to eat 'healthy' carbs under threat of hospitalization if I didn't.