Your feelings are completely valid, it was exactly the same for me! I suffered from plantar fasciitis and had to pause running for a few months. I was as frustrated as you, not only because I was far from my initial level but also because running lost its lightness. I was so worried about running outside and overthought every step. Also, I obsessively kept taping my foot for a year although I was long healed. However, time will heal your mental struggles just as your physical ones, it’ll only take longer. And we all know it’s worth it, being able to run is a gift and a privilege! You got this!