Salaam - Losing the drive and confidence I once had, how do I get back on track?

Assalamu alaikum everyone, I’ll be brief. The last year and this year have been rough and they’ve really chipped away at my confidence and motivation. I’m finally able to talk about some things because I don’t want to stay stuck. Quick background: back in 2022 I had a wake-up moment - I realized I was wasting my time. I was out of shape, didn’t have a license, failed college courses, and my mindset was weak. Starting that June things began to change: I lost about 75 lbs over time, worked hard until I was laid off in 2023, finished college, got my driver’s license, went back to school, applied for a job I really wanted, picked up hobbies I admired, and built a tough mindset that pulled me out of depression and overeating. That resilience felt unbreakable and it helped me grow up. This year though, a lot went wrong: friendships faded, I lost my dog, and I’m in the last year of my second degree after transferring credits. Still, I kept grinding. I stayed consistent despite the hardships and even started seeing someone I thought might become my spouse. After a while she decided she wasn’t ready and left. No hate toward her - just disappointment. Now I’m noticing my willpower slipping. I have low energy in the gym even though my diet’s okay, my social battery drains fast, my mood swings between happy and angry, and my usual habits and mindset don’t seem to be working. I’m doing healthy, Islam-friendly ways to cope with the breakup - spending time with family, avoiding contact, not drinking or trying to replace her - but I still feel like I’m losing faith in myself. I sleep 10+ hours and don’t feel like the person I used to be. I need to find myself again, inshaAllah. Any practical advice, duas, or thoughts would mean a lot. What helped you regain motivation and confidence after big losses? JazākAllāhu khayran for any suggestions.