If it can help you feel better you are not the only one restarting a game.
I was at level 30 and some when I realized that my Staff of Magnus had litterally been swalowed by a weapon rack in Breeze Home. I put a topic on this forum about it and learned that it was a bug. I also was travelling with a book from Winterhold College stuck in my inventory. When Tolfdir asked me to go settle a magical anomaly saying: I hope you still have your Staff of Magnus... Not knowing I could have done without it, I decided to start a new game.
But don't worry, as you already know what to do in certain cases, you'll level up quickly and gain more experience. You can even start with a better character having some immunities or else...Good luck.
