Does anyone have tips on how to deal with overwhelming stress?

My ex and I finalized our divorce within the last week. My depression and my lack of care for myself was the primary reason for our separation. Prior to our mediation, I was doing great in all aspects of my life after a long process of rebuilding. When I signed mediation papers at divorce, that brought on a flood of mixed emotions that it was finally “over”. Ever since mediation, nothing in my life has been easy with stressors from a big work conference, my therapist had her baby early and is on maternity leave, prepping the house for the realtor (we agreed to sell), trying to find my next place to live, my mortgage banker telling me he made a mistake and I likely could’ve kept the house, and seeing both her and her family for the first time in months. I don’t have any depressive thoughts which I see as a huge victory, but I’m dealing with a lot of stress/anxiety now.

I made the mistake of looking back at old messages. The progress that I had made up until mediation would’ve made her old self proud and stay with me. We both made some poor decisions during the marriage that set us up for failure especially with my mental health issues. Now I have a huge dilemma if I need to move onto the next stage of my life or make one more attempt to talk to her. I have an overwhelming feeling that we made mistakes that should’ve been avoided, and we could still make things work now that I’m healthy.

I’ve tried the things that have helped get me to where I was 2 weeks ago - gym, massage, sleep, walking, video games, house work, eating healthy, telling myself that divorce is the best thing for both of us, and a strong connection with Jesus. Nothing seems to get rid of the stress/anxiety.. I don’t want to look back 5 years from now and regret not trying one more time even if she would likely never entertain it.