Lockdown weight gain and I feel miserable

SummerTwentyOne

My SW was 20st and it took me 2 years to get rid of it. I got down to my lowest weight in November to 12st 11lbs with a strict diet and gym routine. Since lockdown I have almost gained a stone and I’ve never felt more miserable in my life. I deal with a lot of mental health issues and the gym was a big outlet for me. My clothes don’t fit like they used to, I feel I have more body fat from not weight lifting and my diet isn’t that same. Thought I don’t eat a huge amount it’s mostly high carb food. I know everyone is struggling at the moment but I don’t know how to feel better. I’ve tried going for a run but it doesn’t feel the same. I’m really really scared I will balloon back up to 20st again. I’ve tried fasting apps but they don’t seem to work. I know 12lbs isn’t a be all end all but it’s the fear of it being the start by the time this is all over. I’m struggling to even get out of bed at this point. Anyone have any advice that would help?