When you were getting better, did your anxiety symptoms vanish just like that, overnight, or it took some time even when you felt you overcame your anxiety completely?

So I've had anxiety for some time but lately I've been feeling a whole lot better every day - I don't have panic attacks for some time, no derealizations anymore, I also don't feel anxious almost at all. Even though, when I'm completely relaxed and not stressed, I still experience muscle twitches some 10-15 times a day (fasciculations) or headaches. Is it something to worry or just the fact that I consciously feel alright doesn't mean my nervous system is back to normal and I should just wait longer?