You say you are type 1. You are taking way too much insulin. And I am sure you are seeing rebound effect.  Do you have the book "Pumping Insulin" by John Walsh.  When I saw how much insulin you were taking I had to look twice to see if it was real. Most people I know who are Type 1 and using insulin are on about 10% of the amount you are on. From what I understand if you are on too much insulin then you can have a lot of lows followed by a ton of highs. The lows are not caught but you see the highs and you end up chasing the rebound highs from the lows. Hope this makes sense. Also I think a CGMS would be a great idea, even if only for a few days.