Nothing since 2007. I saw my doc and extensive blood work every three months for the first three years and remained Hypothyroid, although it was manageable. I just could not take anything because of my thyroid going into hyperdrive. It was awful, massive heart palps, sweating profusely, unable to eat, horrible with what I was originally diagnosed as “panic attacks”. Then complete collapse, freezing cold, unable to wake up, etc. So I leveled out to lower end of normal hypothyroid and have remained that way and can live with it. I could not with the hyperthyroid days, they were debilitating. I remember the day my doc took me off synthroid, he said, in a week you will no longer have the racing thoughts, rapid heart beat, anxiety, which was fine with me.
You have something that is spoiled in your fridge that you are either going to at random times or you have something that spoiled in your fridge that you threw out, but didn’t clean the fridge.
Check your salad dressings and condiments for expiration dates. Think about any meats that you may have defrosted, put them in separate bags and then put back in the freezer.
Check bedrooms for fleas and bed bugs. Steam clean the house. Finally, think about what triggered the episodes. Can very well be something you thought about. Seriously, when I was younger I had a bad experience with being crowded in. Now, I cannot get into a vehicle with more than 3 people without getting cold sweats and anxiety.