Anxiety hell

So I used to be on Zoloft for anxiety before being pregnant with my girls. As soon as I was pregnant I stopped taking it and for some reason the anxiety has been gone completely for almost 3 years!! But suddenly last week it came back out of nowhere and now it’s been sooooo horrible every single day. Is it possible it’s just bc of a little stress? Do I really need to go back to the doctors and get back on my Zoloft or should I wait? I really didn’t want to go back on it and be on medicine again, but I don’t want to feel like this anymore it’s a nightmare!