I Have Ketotifin , doesn’t help. I asked about taking thyroid in another thread but was advised against it because the numbers were okayI don't know much about Octreotide but a quick look at the Wikipedia page suggests it's not something I would ever want to take. Especially as it has to be injected.
If your serotonin is high and cyproheptadine doesn't agree with you why not consider using thyroid to lower it?
For your respiratory symptoms you could consider the antihistamine Ketotifen:
Ketotifen alone or as additional medication for long-term control of asthma and wheeze in children - PubMed
Evidence from randomised controlled trials indicates that ketotifen alone or in combination with other co-interventions improves control of asthma and wheezing in children with mild and moderate asthma. However due to the high proportion of children with atopy in some trials the results cannot...pubmed.ncbi.nlm.nih.gov
So there's three safe things that could help: thyroid, progesterone and ketotifen. And not eating things that upset your gut because that can cause breathing problems or make existing ones worse.
Vitamin D too. You can take up to 10,000IU of that a day without any toxicity.