So much variation in this!
Mine was really quick, once decided then less than 24 hours. I feel the using saline thing that some people describe on here would have been unnecessary for me personally as I just went straight onto insulin but who am I to say! Probably would be a good idea to push them to let you attend a carb counting course though (something I didn't have opportunity to do pre pump)
First had to split lantus, then switch to Tresiba. When the later failed to reduce hypos just like the first one then a pump was decided upon. They said 'im afraid we will have to consider the pump' and I was so happy, still don't know why they thought I might not want one!
I think being seen in the preconception clinic helped as well. The targets they want a person to achieve with so few hypos really need the pump.