How long does shipping take to US

So I bought some books on Black Friday, and I didn’t get an update until 10 days ago. Now the two that weren’t infirmary have been sitting at the Birmingham facility for 10 days with no new updates and the 1 book from the infirmary hasn’t even gotten that far, I have no updates on that one. It’s been a month a month now and I know they were backlogged but this is taking forever and it makes me uneasy. Is this normal?