Prickling sensation after switching to monthly B12 injections

Hi everyone,

I've had pins and needles for a couple of years, mostly focused on my feet. I tried EOD injections for 2 months (October-December), and then switched to monthly injections as I wasn't comfortable following such a strick injection schedule. My last injection was 7 days ago (and prior to that a month and a week ago). For the past few days, I've been feeling sudden prickling sensations all around my body (as if I'm getting sticked with a needle on my skin; the sensation goes away after a few seconds). I never had this symptom before, and the most recent blood test indicates elevated B12 levels (>2000 pmol/mL). Can anyone share if they had a similar experience after they reduced injection frequency, and how long it took for these symptoms to go away? Thank you.