I think that in order to get a handle on these symptoms you will need to keep a journal...log your blood pressure in the morning and evening at least. It will tend to be a bit higher in the morning or after a large meal. If you can, even take your temperature, to see if the attacks have a cyclic fever involved. Many autoimmune problems come with cycling fevers.

Also journal what you eat each day, and your symptoms each day.
If there is a trigger that causes this cycling you will find it.
Sometimes the foods give the reactions hours or a day after you have consumed them.

Allergists really love journal keeping...as they can then see trends.

I think it is always helpful for doctors to see stats/vitals logged as this is what they look at when you are in the hospital.