Need help to cope with my anxiety relapse

Hi there guys. I hope everyone is doing well. 🙂 A little about me, I'm 37 & have suffered with anxiety for about 10 years. I've learned to control it for the most part, some years better than others, with natural supplements & a small dosage of anti-anxiety meds.

Jump cut to present day, I'm having awful anxiety that refuses to let me sleep. I haven't slept well in 4 days, my heart is constantly racing & to make matters worse, I have a trip to NY scheduled in about a week with my family. I hate flying and I just don't know how I will be able to deal. I also was just getting over a bad insomnia bout that lasted almost 2 months, (crazy, I know) was only sleeping maybe 3 days a week. I blamed that on depression.. ironically I wasn't all that anxious during that time, just exhausted & depressed but I know it took a toll on my mental health. I should add that I weened off my meds about 3 months prior. I was only taking a tiny dosage, about 10mg or less, mostly to keep the withdrawal symptoms at bay but I know that might have contributed to my relapse..
I was genuinely feeling great anxiety-wise with just natural supplements..I had been sleeping pretty well for about a month..until last week. The stress of the trip suddenly feels overwhelming & I've gone back to old bad habits of worrying incessantly about my health, especially my heart. I just went to the doctor 2 days ago & got a physical with full blood work & even an EKG. Everything came back normal, blood work was especially ideal. My blood pressure was a bit high but I have severe white coat syndrome & the doctor didn't even mention it so I'm hoping that means I'm ok. But I'm still a nervous wreck. He prescribed new anxiety medication, I will start using it today. Hopefully that helps..
My biggest fear right now is that my anxiety will knock me on my butt as bad as it did the first time. I was bedridden for days the first time I had awful anxiety. Something that makes me feel a little at ease is that, unlike that first time 10 years ago when my anxiety was constant & unrelenting for days, now I have fleeting moments where my anxiety completely vanishes... specifically when I go to Bible study meetings. (I'm studying with Jehovah's witnesses) It's crazy how much an effect growing spiritually can have on the mind..
So I'm just wondering, or more like pleading lol, any tips & comforting words on how to deal with a relapse? I think if I could just string together a few good nights of sleep I should be somewhat ok.. Any ideas of what sleeping aids I can take that are not too harsh and/or techniques I can use to get over anxiety related insomnia?
Thanks to anyone that took the time to read my long thesis, I can be a bit wordy when I'm losing my mind. 🙂 Take care, y'all. x