When the Mind Wanders During Prayer

Assalamu alaikum. My memory has been failing me a lot recently. I used to think forgetting whether I brushed my teeth was a big issue, but that feels minor now. During Salah, I often lose track completely and have no idea which rakat I'm on. The two-rakat prayers are manageable, but even with Maghrib? Wallahi, it's becoming so difficult. Sometimes I finish praying and am left wondering if I even performed the fardh correctly. Does anyone else go through this?