Hey no you're not declining!
I think this happens to a lot of us from time to time! I have become fairly good at recognizing it in myself (mid 30's) and have learned what I need to do to get over the hump!
For me - it helps to step away from work. I mean, really step away to the point I completely forget about work. Go play pickleball, take a day trip, hike, swim, camp, try something entirely new that you have never done before (skydiving, SCUBA lessons, cross-country skiing), etc. The goal is to become immersed in your environment to the point it requires a great use of your mental capacity - in a way that is engaging and fun.
Even if I don't feel like stepping away from work and I disagree with myself that the issue is actually becoming too immersed in my work for too long, I have learned to simply default towards leaning on experience and getting away for a while.
By the time I come back to the same problem if I haven't already gathered a good idea as to how to go about it, I will at least have a new perspective; it's a win-win.
Please take care of your mental health, take care of yourself and don't be too hard on yourself. Give yourself a second chance, draw things out, get out of the office, take a break, and come back and approach the problem after you've refreshed yourself!
For me - it helps to step away from work. I mean, really step away to the point I completely forget about work. Go play pickleball, take a day trip, hike, swim, camp, try something entirely new that you have never done before (skydiving, SCUBA lessons, cross-country skiing), etc. The goal is to become immersed in your environment to the point it requires a great use of your mental capacity - in a way that is engaging and fun.
Even if I don't feel like stepping away from work and I disagree with myself that the issue is actually becoming too immersed in my work for too long, I have learned to simply default towards leaning on experience and getting away for a while.
By the time I come back to the same problem if I haven't already gathered a good idea as to how to go about it, I will at least have a new perspective; it's a win-win.
Please take care of your mental health, take care of yourself and don't be too hard on yourself. Give yourself a second chance, draw things out, get out of the office, take a break, and come back and approach the problem after you've refreshed yourself!