Crickey that's a lot of change in shifts, no wonder your control is poor. I only worked one late shift 12-8pm a week and it took me days to get back into control.
I discussed this with my GP who was very supportive and suggested that discuss with my line manager and if not resolved would sign me...
Hi
I joined SW two weeks ago, had one hypo and resorted to a 150 ml can of coke makes a change from the gorging till I think my b&m has increased! Packet of biscuits later Good luck with your weight loss journey and hopefully the hypos settle