My daughter is 3.5. We moved mid-Oct & had big sleep issues as well. She aslo was coming into our bed, which she had not done once in awhile, but we were always able to quash with firmness.
We thought after about a week she should be used to the new house & that is was time to lay down the law again, but it didn't work. A month after the move, at my exhausted wit's end, I spoke with her peditrician. He smiled knowingly as he informed me that it can take up to 6 months for a child to adjust to such a big change! I'm sure I looked absolutely horrified. "What about her getting too used to sleeping with us?"
"You successfully laid down the law when she was younger. The foundation is there. You'll be able to do it again. My question to you, is how big of a fight & struggle do you want it to be?"
So we talked to her, ackowledged her fears, & gave up fighting her on it. After 2 nights she started coming up only when she woke up in the morning before me - to lay in our bed, or a little travel bed we have set up next to ours. Of course there have been regressions, depending on what's going on, but there have been several whole weeks where she sleeps the whole night by herself. I think next month will probably be the one that we make the transition reclaiming our space. We'll see.
Maybe check with your pediatrician?
Good luck!!