Certainly is a big change. When hypo was your mood euphoric? If so and its now dysphoric (low) you also might be getting mixed. Either way as ElsaMars said definitely keep an eye on it. If this gets worse or lasts more than a few days maybe call your psychiatrist and let them know? Not sleeping well can wreck havoc on our lives so it's important you try to get some. Do you have any sleep meds? Wish you all the best.