hi today i have been out and about i went to local shopping centre today which is a fifteen minutes walk away came home then after a bit about hour went back and i came back home ate food injected 10 units of novorapid sugar was 7.0 after 3 hours sugar went to 5.3 so ate a banna normaly 10units would be fine could my sugar have droped more becuase i have been walking around today?.