okay so when you were off protophane were you on any other long acting at all? If were on no long acting I now understand why he put you on protophane. have you thought about the newer insulins at all like maybe a lantus and either humalog or novorapid combo....that may help the hypos to be less severe. You do appear to be on what is these days quite a kinda old fashioned insulin combo, but hey if it works, don't knock it!
The hypos will be a right royal PITA for the next few weeks. the best you can hope to do is treat them asap and ride it out...there is no real magic solution for the first trimester hypos, some people get them worse than others but because so many other hormones are having their say at the moment it is a tough one.