I agree maybe she won't eat those medicines the doctor prescribed her. Maybe she was a nurse before, And remember that cv's are giving us a hint that after Gauri will regain her memory, She might be a no- nonsense woman. And will take avenge from the Kapoors.
And I agree with you there is a possibility that Neetu and Co. will try to kill Kalpi as she heared each and everything and Neetu knows that she's too smart that her intentions are too obvious for her to notice and Thus, now she will be their target as she is the witness in this particular situation. But don't worry, If they'll really hurt Kalpi so what? There's Raghav Singhania! So be optimistic!