losing trust in yourself

has anyone else experienced this feeling after having a panic attack? I had a massive one last April which spiraled me into a deep dark mental breakdown for months. I finally got the courage to try meds last July and I’ve been on them and working in therapy ever since. But sometimes I feel like I have a hard time trusting myself, like I know I’ve made progress but I get scared that i’m just one panic attack away from losing my mind. I think I’m just so fearful of spiraling out of control again- maybe it’s PTSD?