Nocturnal anxiety, panic attacks???

I’ve been having a horrible time with different symptoms from this long Covid since February, and recently was diagnosed with POTS…and it’s severe where I cannot stand in one spot, sometimes for more than a few seconds, sometimes I can go minutes… It all depends on the day and how I’m feeling. I don’t know if it’s because of everything going on physically with me or if this is another symptom of this horrible thing that’s taken over my body.
In the last week, I have woke up 3 different nights in the middle of the night sweating in a panic like something horrible is wrong, and the most loud hissing in my head… I can only describe it as the most horrible feeling in the world imaginable. They had nothing to do with dreams or nightmares, it was an anxiety attack I believe that woke me up, then I got up and was in a terrible depression for no reason.
I’m just curious if this is happened to others. Like I said, I don’t know if it’s a symptom or if I’m worrying deep inside because of everything physically happening to me.
I’ve had severe postpartum depression 30 yrs ago with my daughter and almost did not come out of it and I am very extremely afraid that it will come back because I don’t think I will be able to get out of it this time. 😞