I have been injecting for 3 and a half weeks now and have never felt so ill in my whole life. Tired and weak a lot of the time, and I keep having these big crashes in energy (really tired, sleepy, ultra low energy) from about 1 to 3 hours after injecting. Sometimes it improves after 20-30 mins. I had to stop Abasaglar as I just felt like a zombie all the time, so only on the fast acting now for a couple of weeks. Has anyone else experienced these energy crashes or know what causes it? GP said it could be a reaction to the insulin, diabetes centre sceptical about that but not much help other than that and to say you have to take it.