Mid 30's and life reset itself on me 9 months ago, I went from a secure office job to starting fresh with a new industry and career. I am also an Ultra Marathoner and that was the only part of my past life that was working out and was my stress buster. I had a simple 40 hour work week with aggressive sales targets and a job I was receiving a ton of unnecessary sales pressure. The stress at work transferred to home and it took a ton of effort to make it through a work week.
I now work full time in an outdoor government job and work part time in a fitness store. I work more hours then I previously used to at my old job and make roughly around the same income, the major difference now is I enjoy every hour of work I work a week now vs the stress induced pay-cheques I collected before. The work I now do is honest and helpful, rather then sell to hit targets that did sometimes didn't help the client.
My advice is this:
Take the pay downgrade to do work that you enjoy vs earning pay-cheques to pay the bills.
If you need to rack up some debt to retrain - do it, if you need to work 6 days a week for a while and work 70 hours a week do it.
If you have a SO don't feel guilty about them holding down the finances while you take a step back and find a passion.
Delete distracting technology. I deleted LinkedIn, removed a ton of toxic people from facebook, cleaned up all my useless posts, pictures and negative minded thoughts from Reddit, Imgur and Facebook. I have never had Instagram, twitter or snapchat so that was easy enough to avoid.
Take time to simplify your life and get off tech, find something that makes you happy and work at that.
Since leaving my stress filled old industry, I am happy, stress-less, working part-time in the running industry and get paid to talk, advise and share my passion for running. My full time job is punch in and punch out monday to friday, honest work.
If you need more advice or an ear, message me - If its hard or difficult then your doing the right thing, life moves pretty fast, if you don't take time to look around...don't coast pay-cheque to pay-cheque, not worth it.
Good luck!!