Please help me make sense of this

I posted in here for the first time just yesterday and was happy to get very thoughtful and encouraging responses. However, tonight I am extremely restless and stressed out. Warning: this may be long but I'd greatly appreciate a solution to this mystery

So to give some backstory: my health anxiety developed when I had two infections and was given a concoction of medications that changed about three times. Among them I took Flonase. I had my first panic attack the day I started this medication. Instinctually I knew it was the spray and also read online that it had a similar effect on others. I took it intermittently for three months after that (with zero panic attacks) and did exactly what you're not supposed to do: quit cold turkey. Probably one of my biggest regrets ever.

Hours later, I have shooting back pains, tachycardia, joint and muscle pain, and the worst panic attack I've ever experienced in my life. I took 20 mg of Valium and that still was not enough to get me to calm down after 20 minutes or so of hyperventilation (I thought I was going to pass out, for sure)

I end up in the hospital and while Im there I get the feeling to look up Flonase and my symptoms. I find online the very rare (but still possible) chance of developing adrenal insufficiency or suppression while on the drug. Meanwhile, my doctor was asking for a pelvis exam which makes zero sense to me as none of my symptoms had any relevance to my pelvis, but I agree. Everything comes back normal as expected and she talks of releasing me (while my pulse has been steadily at 115bpm). She did no other tests and I'm beginning to get frustrated. I tell her im worried about my hormone levels and spout the knowledge about adrenal suppression and she laughs at me and says that's extremely rare. I read every single symptom and it matches up with mine. So after much frustration and attempts to break through, I decide I'm wasting my time and to release me. She gives me a form of endocrinologists in the area.

Months later, I am due for a regular checkup with full blood panel. I get results back and everything is normal, except one thing that sticks out: my carbon dioxide level is strangely low and below the minimum of the standard range. I shake it off, of course as my friend me mentioned it could be from anxiety of being stuck with a needle. Another strange thing happened at this visit though: I begin to feel a little faint as the nurse checks my blood pressure and it is extremely low. She tells me to lie down and that I look very pale. I do and she asks me if I've eaten enough today. I have, in fact I just had a large lunch. After about twenty minutes, she checks it again and it's a normal 110/70.

Recently I've had an intense urge to drink lots of water and I've been thirsty and peeing more than normal. To make sure it's not some strange byproduct of Valium, I google it. Adrenal insufficiency pops up and I read up on it. Multiple incidents and symptoms (including awful anxiety and depression and a relatively short but still scary food phobia) come up in the search. Apparently drops in blood pressure, anxiety/depression, failure to put on weight, shooting lower back pains, fatigue, muscle weakness, higher heartrate, loss of appetite, and abnormal CO2 levels in blood can be attributed to this disorder. All things I've personally experienced.

So now I'm freaking out. This can cause serious problems even death. I didn't have any problems with anxiety or depression until I encountered this drug and while on it I have zero problems but as soon as I get off it? All hell breaks loose. I'm thinking it did something to my hormones but I'm not sure what and in true hypochondriac form, I'm thinking to worst which is adrenal crisis ---> coma ---> death.

I would just like to say if you made it all the way through you're an angel this was very convoluted and personal and messy. I'd appreciate ANY feedback.

Thank you very much. I will do so soon.
I struggle a lot with what is actually plausibly something going on not related to my anxiety versus the vicious cycle of being anxious and then properly recognizing the symptoms of that.

I'm scheduling an appointment with an endocrinologist soon. If everything comes back normal, then I'll really just have to accept that this is entirely a mental disorder and I should see someone.

Thanks again!