I have had my ileo since 1984 and have been self injecting 1 cc every 2 weeks since then. Yes, I can tell when I am due for the shot --- I feel like a "slug" w/o appetite, lethargic, etc. I did not experience any of the tingling, numbness feeling.
Are you well hydrated? Dehydration can also result in some of these symptoms.
How about your potassium levels? Have you had lab work to check all your levels lately?
Diagnosed with CD in 1979, many resections and meds
Perm Ileostomy July 1984 at Cleveland Clinic
Disease free since surgery