I know them feels too well.
I have pretty bad anxiety & was taking meds for it for awhile, then I ran out... and It was going away.
Now I'm not so sure... :c

I have to go to a specialist or something now and I am not looking forward to it. -u-;

Its kinda hard to handle anxiety by yourself since its chemical/brain related & it feels like it has total control at times.. but I learned there are certain things that keep it at bay.
Like reading one of my favorite mangas or taking a long arse shower or laying down and playing Animal Crossing for a bit.
Or napping if its not too bad.