Change of behavior - snake crawling back into their shed?

Hi,

I have an almost 3-year-old corn and he has never had any problems before. He has never refused a meal, comes out at dusk sometimes, or stays curled up under his log or burrowed in his aspen. He eats an adult mouse every 8-9 days (about 22-25 grams) and he currently weighs exactly 500 grams. He is great with handling and has never hissed, musked, or attempt to bite me. His sheds come off in one piece. He currently resides in a 20 gallon.

Over the past month, his behavior has changed. He shed about 2 weeks ago and he crawled back into his shed. He got out of it by tearing his shed and he decided to go back inside again. Ever since then he has been super active and restless all day and night. He will roam his viv looking for a way to escape, after 20-30 minutes, go back under his log (his favorite) and then go back out again a few minutes later. I'm concerned because he has never done this before. I thought maybe he wants to mate? Should I take him to the vet? Should I increase his tank size? Please let me know if I should do something! I want him to be as comfortable as possible.

I've attached a couple pictures of the beautiful boy ◡̈

Thank you!