Boa started shaking his head rapidly

[JessterK]

So I have Mittens, a Pastel BCI, my first and only snake, he is 3 months old. He has done fine for the most part, he is very social, seems to enjoy handling, and has never tried to bite. He had one issue of regurgitation 2 weeks after I brought him home 2 months ago, but it has not happened since. He eats fine, and I had a mite issue 2 weeks ago so I sprayed him with Natural Chemistry and introduced Hypoapsis Miles to his vicarium as I’ve heard great things about them as mite control. It seems to be working as I haven’t seen any more mites in him nor does he soak a lot in his water bowl. So just as I was breathing a sigh of relief that all issues were resolved, today he just started shaking his head rapidly from side to side. Then, he was fine again. I’ve never seen this before. Is IBD likely? I’m freaking out, thanks in advance. Also nice to meet you all, I tried to introduce myself last week but my post never escaped the moderation phase, it seems.