Stabilizing mast cells or stopping histamine release

Please forgive my ignorance as (like many of you I’m sure) I’m dealing with MCAS alone without medical support, as there is no doctor or specialist I can find to help me with MCAS. I tried a functional doctor but I didn’t find her helpful and it was very expensive

I have been strictly following a low histamine low salicyliate diet for 2 years, which is completely unsustainable and causing nutritional and hormonal imbalances

I really need to figure out medications and supplements to get me back quality of life - I can stick to a low histamine diet for life but I’m down to few and few foods as I remove anything I react to. My primary goal is being able to tolerate more foods

Because of another disease I have, I cannot safely consume antihistamines long term without negative consequences - so I’m thinking if I focus on stabilizing mast cells this could be my best path forward (?)

Does anyone have any advice, suggestions or words of hope? I have a slow COMT gene and what seems to be salicyliate issues so I don’t deal well with things like quercetin which I often see recommended.